Genus Thantocharchara

The genus Thanatocharchara holds nine species of tiko and stands as the reclusive counterpart to the social and human-engaging Tikonnis since most of its members live solitary lives across the cold and temperate seas and keep out of sight in water that runs deep or remote or both. The hallmark of the genus is the mass of tissue atop the head that looks like an oversized braincase and in most species it's a store of thick fat that buffers the animal through the lean stretches of the cold seas they favour. The structure has been turned to other ends across the genus where it's reinforced into a ramming tool in the bowhead tiko, packed with muscle for the head-bumping of the pygmy tiko, built into a shield against predators in Janet's tiko, and swollen into a buoyancy and sound organ for the deep dives of the haunter tiko. A sloping hump runs along the back behind the crest and gives the animals the hunched line the genus is known for and the same fat-storage habit drives it. They carry the splayed irregular underbite shared across the tikos where the teeth sit at uneven angles and deliver killing wounds to large prey once the jaws close. Tikos as a whole fill the shark-like predatory niche that sits between the dolos and the hemots and contest the sharks they overlap. The Thanatocharchara push that role into a range of specialist forms that runs from the small heavily hunted Janet's tiko at 3 to 4.5 metres up to the huge and dangerously aggressive azure tiko at 14 metres. Several of them work the seabed and reshape the ground they feed on in the way tikos are known for. The kyber tiko ploughs the soft shelves and the perth tiko rakes the sediment with its tusks while the bowhead tiko breaks and stacks the polar ice. The genus runs intelligent and its disposition spans the gentle deep-living bumphead tiko that takes no notice of humans to the azure tiko that ranks among the most aggressive animals in the whole family. Most members keep to the solitary life though the pygmy tiko and the haunter tiko break that rule and hold lasting fleets. A few of the otherwise solitary species gather on long feeding migrations. The animals lean toward the cold and the deep across the genus though several have moved into warmer water and the pygmy tiko and the perth tiko range into the tropics and the subtropics. The genus came through a hard history under hemoling-era hunting that fell heaviest on the crested species prized for the fat and the muscle of their heads. Most members sit threatened today across a span from data deficient to vulnerable and the deep-dwelling bumphead tiko is the only one to hold a least concern status.

Bumphead Tiko (Thanatocharchara repono)

The bumphead tiko is one of the larger members of the Thanatocharchara genus and one of the most visually striking tikos in the genuswith adult lengths ranging from 8 to 9.4 metres (26.2 to 30.8 feet). The species takes its common name from the enormous cranial and dorsal masses that swell outward from the head and run in a connected ridge along the upper back, structures that give the species its alarming silhouette and that have made the bumphead one of the most immediately recognisable cetomorphians to anyone who has spent any time near nature content online. The fat-rich tissue inside the bumps is the species' primary energy reserve and the swollen cranial and dorsal masses serve as caloric storage between the deep-water hunting bouts that make up the bumphead's life. A well-fed adult carries enough stored energy in the bumps to sustain the animal through prey scarcity periods of months at a time and individuals coming off a successful feeding run show bumps so swollen they alter the silhouette of the head from above. The visible surface of the bumps carries the species' display colouration, a large range of reds, purples, and deep blues with flecks of pink and pale silver-white scattered across the dorsal ridge in patterns that vary between individuals enough that experienced researchers can recognise specific bumpheads by their bump patterns alone. The colouration acts as an honest signal of male condition during the breeding aggregations the species forms in productive feeding regions where the size, brightness, and pattern density of a male's bumps tell prospective mates the animal's hunting success across the years leading up to the encounter. Females are larger than males and carry their own bump development at more muted colouration levels. The dentition is one of the species' more distinctive features and the source of much of the bumphead's online appeal. The teeth of the bumphead's underbite splay outward in irregular angles and the jaw closes unevenly across the mouth which gives the animal a perpetually mangled grin that researchers have likened to a smile drawn by someone who's never seen a face. The dentition is functional for the species' prey base since the splayed irregular teeth handle the cephalopods and ammoteuthids that make up the bulk of the bumphead's diet, gripping slippery cephalopod bodies and crushing pelagiteuthid shells in ways that more regular dentition would struggle with. The bumphead hunts in the deep mesopelagic and bathypelagic zones across its range and the species is a deep diver with documented dives to 1,200 metres and individuals occasionally pushing past 1,500 metres during pursuit of deeper prey. The diet is built around medium-sized cephalopods, schooling deep-sea fish, smaller pelagiteuthid ammoteuthids, and the occasional juvenile gigateuthid taken when the opportunity arises, though adult gigateuthids are well beyond the bumphead's preferred prey size and the species avoids the neodracodons that contest those larger ammoteuthid populations. The species ranges across the cold and temperate deep waters of the North Atlantic primarily with documented populations extending into the North Pacific and the Southern Ocean around the sub-Antarctic islands. The deep-water habit means the bumphead surfaces only briefly between dives and the species spends the overwhelming majority of its life in the lightless mid and lower water columns where the bulk of its prey lives. The rarity of surface appearance is the main reason the bumphead remained unknown to Western science for so long after coastal communities and sailors had been reporting sightings of "the grinning sea devil" for centuries. The species was treated as cryptid or as common tikos with deformities for as long as the records ran and the Norwegian fishing traditions of the North Atlantic carried the most consistent body of bumphead folklore though the descriptions were dismissed by naturalists as sailor's exaggeration. The breakthrough came in June of 1853 when the French-American explorer Paul Du Chaillu brought a complete carcass back from his North Atlantic expedition. The remains had washed up on the Newfoundland coast and Du Chaillu recognised them as a tiko but couldn't place them within any known species and his return to Paris with the specimen triggered a prolonged taxonomic debate that initially settled on a deformed common tiko before later specimens established the bumphead as its own species. The bumphead is one of the more solitary tikos and adults typically maintain individual ranges that overlap with other bumpheads only at shared deep-water feeding regions. The species doesn't form the matrilineal fleets that organise life in the Tikonnis genus and an individual bumphead lives most of its life without sustained social contact beyond the mother-pup buccolactation period and the brief mating aggregations the species forms in productive feeding regions. The aggregations happen in late spring and early summer in the North Atlantic populations and in the equivalent seasonal windows in the Pacific and Southern Ocean ranges and bumpheads converge in groups of fifteen to forty individuals over the course of two to three weeks before dispersing back to solitary life. The mating centres on the male display behaviour where males surface together and show off the bumps in coordinated displays that range across the surface for hours at a time. The females observe from below and make their selections across multiple display sessions before the actual mating occurs. The aggregations are the only time bumpheads engage in sustained social behaviour and the brief intensity of the mating window stands in contrast to the long solitary stretches that make up the rest of the bumphead's life. Researchers at the Pescanguid Research Institution have documented the aggregations from surface and submersible observation since the early 2000s, though the deep-water habit of the species outside the aggregation window keeps most of the bumphead's life beyond direct observation. The bumphead's cultural position is one of the more interesting examples of how internet-era engagement with cetomorphians has reshaped public attitudes toward species that older generations found alarming or grotesque. The combination of the mangled grin, the swollen bumps, the gentle solitary disposition, and the alarming silhouette has made the bumphead one of the most beloved tikos in current internet culture with a dedicated following that has produced an enormous output of plushes, figurines, illustrations, and short-form content centred on the species' unusual appearance. The bumphead's complete lack of documented aggression toward humans, a function of the species' deep-water habit keeping it almost entirely separated from human activity, has helped the cultural reception since there's no horror-story counterweight to the ugly-cute appeal the way there is for the azure tiko. The fandom has produced its own running set of jokes and reference points around the species and the bumphead has become a fixture of cetomorphian-themed content in ways that have spilled back into conservation engagement with the species serving as an entry-point for younger audiences who come to the broader cetomorphian world through bumphead content first. The merchandise economy around the species has been used by several conservation organisations as a funding stream with licensed bumphead plushes contributing meaningfully to broader pescanguid conservation programmes. The conservation status is currently least concern and the bumphead is the only Thanatocharchara member with that status. The deep-water habit kept the species out of the heaviest hemoling-era hunting pressure since hemolers targeted surface-active species and the bumphead's rarity of surface appearance has continued to protect it from most direct human pressure into modern times. The species faces some pressure from deep-sea fishing operations that catch bumpheads as bycatch and from the broader pressures of ocean warming on deep-water prey populations but the population is stable globally and the species is one of the relative bright spots in tiko conservation. Lifespans average ninety to one hundred and ten years with reproduction occurring at intervals of five to six years and gestation lasting around thirteen months. The single semi-precocial pup stays with its mother through the three to three-and-a-half year buccolactation dependency typical of mid-sized tikos before dispersing into the solitary adult life that defines the species.

Pigmy Tiko (Thanatocharchara apatomicro)

The pygmy tiko carries a name that misleads since it runs bigger than the bolted tiko at body lengths of around 9 to 11 metres (30 to 36 feet) and sits among the mid-sized members of the genus Thanatocharchara. The species was first classified as a tiko of the genus Tikonnis and held that placement for years before further analysis confirmed it as a Thanatocharchara and the mistake came down to a few things. The crest atop the head and the hump along the back both sit reduced in this species against the prominent versions the genus carries and the animal lives in much warmer waters than its cold-water cousins, so the early naturalists read it as a Tikonnis and the species name apatomicro nods at the misleading size that helped fool them. The pygmy tiko also breaks the solitary rule of its genus and along with the haunter tiko it's one of the only two Thanatocharchara that lead a primarily social life. It holds fleets of five to ten animals that run mostly female and the young males disperse from the fleet once they reach maturity. Those matrilineal fleets gave the early naturalists one more reason to take it for a Tikonnis since that social structure marks the Tikonnis genus and sets it apart from the solitary Thanatocharchara. The colouring splits across two regional variants. The warmer tropical form carries a white back over a dark navy-blue belly in a reverse countershading and freckles of brown, black, and green scatter across the body and the pattern blends the animal against the bright sunlit shallows from above and hides it against the seabed when it hunts the bottom. The northern form keeps to the colder typical ranges of the genus where cold-water fishermen meet it most often and these animals run black overall with swirls of brown and white worked through the dark. Though the crest sits reduced in size it's built from dense muscle where the crests of the other Thanatocharchara run to soft fat and the pygmy tiko puts that muscled crest to a social use. Animals in a fleet lift their heads above the water and bump their crests together and the early naturalists read the head-bumping as a mating display where it's now understood as a bonding habit that runs across the whole fleet and strengthens the ties between its members. The pygmy tiko feeds as an opportunistic omnivore and takes whatever it can find from fish and cephalopods to shellfish, carrion, and the plant matter of the shallows. The species keeps clear of humans and human activity and the wariness traces to the dangers people have posed since sailors hunted the pygmy tiko through the 1800s for the muscled crest. The pressure eased after the 1967 hemoling ban and the populations recovered well over the decades since so the pygmy tiko stands healthier than its endangered cousins. The eat-anything habit that serves it so well now works against it since the species swallows the debris and plastic that fill the warmer waters it favours and the rising load of ocean pollution stands as the main threat to it today. The pygmy tiko sits at near threatened on the strength of that pollution pressure and the Pescanguid Research Institution tracks the fleets and the contaminant loads they carry. Breeding produces a single pup born into the fleet after a gestation of around fifteen months and the pup is buccolactated through a dependency close to three years while the fleet shares in its rearing. The females stay with the natal fleet through their lives and the males break away at maturity into the solitary life the genus is known for. Females breed at intervals of five to seven years and lifespans run to around 110 to 130 years in the wild.

Azure Tiko (Thanatocharchara dakoti)

The azure tiko is the largest member of the genus Thanatocharchara and the bulkiest tiko in the subfamily Ophidrakiae. Adults reach body lengths of 14 metres (46 feet) that match the arctic tiko and place the species among the largest tikos alive. Its colour sets it apart at first sight and shows a light blue distinct from the grey-blue tones common across other pescanguids. The blue carries a patterning of black and dark red that ranges in intensity between individuals and the dark red sits heaviest on the tips of the flippers and runs in freckle-like scatters across the face and muzzle and in wavy bands along the back. Both sexes carry the black lipstick marking that edges the end of the muzzle. Like the rest of its genus the azure tiko carries a fat-rich mass atop the head and a sloping hump along the back. The cranial crest is the largest in the genus and the most heavily muscled of any member. The added muscle gives the head a blunt powerful profile that suits the animal's bulk. Females run larger than males across the species while the males stay smaller and carry the heavier aggression and the stronger drive to hold territory. The dentition follows the splayed irregular underbite shared across the tikos where the teeth sit at uneven angles and deliver killing wounds to large prey once the jaws close. The species ranges through the cool and temperate waters of the eastern Atlantic from the Iberian coast south along the western shores of Africa and it concentrates around the cold productive upwelling systems that run down that coast where prey gathers in the rich water. The azure tiko lives alone for most of its life and the solitary habit makes individuals hard to locate across the open range they patrol. Females travel in pairs on occasion and the rest of the time the animals keep to themselves and defend the stretches of water they hold. The azure tiko hunts as a large macropredator and takes big pelagic fish, cephalopods, ammoeuthids, sea crocodiles, and the smaller pescanguids that share its range. The splayed dentition handles large struggling prey well and the powerful jaws and bulk let the species tackle animals that smaller tikos couldn't hold. Few predators threaten an adult and the main pressure comes from the tiko shark (Carcharias tikoensis) which takes its own name from the azure tiko and targets injured or fatigued individuals when it can. What defines the species in the public mind and in the literature is its aggression and the azure tiko is one of the most aggressive animals in the whole family Pescanguidae. The aggression reaches well beyond humans and the species turns it on rivals, on other pescanguids, and on anything that crosses into held water. The behaviour traces to territoriality and to a high concentration of hormones in both sexes. The heavy load of testosterone in the males pushes them further still and makes them the more dangerous of the two to encounter. The azure tiko sits alongside the parroting dolo and several neodracodon hemots as one of the few pescanguids that actively seek out aggressive encounters with humans and the records of injury and death run back through the long history of contact along its coasts. The species is a capable and quick-learning animal and its intelligence falls in the broad class of the smartest dolos and of corvids, some primates, and octopodes. The cleverness shows in how readily an azure tiko learns the patterns of boats and people in its range and turns that learning toward the encounters it seeks. In the wider culture the azure tiko stands as the dangerous and beautiful counterpart to the beloved bumphead and where the bumphead draws affection the azure draws fear. Coastal communities along the Iberian and west African Atlantic have known and named the animal for centuries as a blue devil of the inshore water and the warning to keep clear of it has carried down through that long record. The azure tiko was hit hard by the hemoling era and the muscular vicious-looking head made it a prized trophy for the high-end hunters who wanted a mounted azure head on the wall. Hunting through the 1800s and into the twentieth century drove the species down and numbers reached critically low levels that held through the decades before the 1980s. The hemoling ban of 1967 and the protections that followed gave the population room and a slow recovery began in the early 1980s. As of 2026 the azure tiko is still classed as endangered though the numbers sit closer to acceptable levels than at any point in the past century and the Pescanguid Research Institution maintains ongoing monitoring across the range. Breeding follows the solitary pattern of the species and a female raises a single pup at a time. Gestation lasts around seventeen months and the pup is buccolactated through a dependency of roughly two to two and a half years before the mother breaks contact and the young animal is left to fend for itself once it's developed enough to hunt and hold its own. Females breed at intervals of seven to nine years and the slow turnover sits behind the species' long climb back from the hemoling era. Lifespans run to around 160 to 180 years in the wild.

The Perth Tiko (Thanatocharchara makrodens)

The Perth tiko is the second largest member of the genus Thanatocharchara and one of the larger tikos overall. Adults reach around 13 metres (43 feet) and sit just under the azure tiko at the top of the genus. It takes its name from the waters off Perth where it turns up most often, though it ranges right around the Australian coast through the temperate and subtropical shallows. What sets it apart at once is the pair of tusks. These are two teeth on the lower jaw that grow outward and upward past the lip and reach lengths of five feet in the largest animals. Like the rest of the genus it carries a fat-rich crest atop the head and a sloping hump along the back. The build runs heavy and robust to match its size. The colouring stays muted across a range of olive, tan, maroon in the males, and sandy grey that blends into the seagrass beds and soft bottoms where the species spends its time. Behind the tusks, the mouth holds the splayed irregular underbite shared across the tikos for gripping and wounding prey. The tusks differ between the sexes where the males grow the longer pair and use them to fight one another while the females carry shorter tusks that work as tools for sifting the sediment and prising prey loose. What marks the Perth tiko out is its diet since it's the one omnivore in a genus and a wider family of meat-eaters. It grazes underwater plants in the shallows and crops seagrass and the soft growth along the shoreline. That plant matter folds into a diet that still leans on hunting. The long neck lets it work the bottom while the body stays level above. The females put their tusks to use and rake through the sediment for buried shellfish, crustaceans, and burrowing cephalopods. The raking leaves the seabed turned over behind a feeding animal and adds the Perth tiko to the short list of tikos that reshape the ground they feed on. When it hunts in open water it takes fish and cephalopods the way the rest of the genus does. The species keeps to the productive coastal shallows and the seagrass meadows that ring the southern and western Australian coast and the meadows off Perth hold the densest numbers anyone has counted. It lives alone for most of the year in the solitary pattern of the genus though the breeding season pulls the males together where they spar with their tusks in contests that can leave deep scars and broken tips. Those gatherings are brief and the animals scatter back to solitary life once the season closes. Large sharks press on the young and the sick while a healthy tusked adult has little to fear in the water it patrols. The tusks drove the species' hardest stretch of decline since the ivory drew hunters all through the hemoling era. Animals were taken for the tusks and the meat through the 1800s and into the twentieth century and the population fell well below safe numbers before protection caught up. The 1967 hemoling ban and the Australian coastal protections that followed gave the species room and the numbers have climbed back over the decades since. The Perth tiko sits at vulnerable today and the Pescanguid Research Institution runs long-term monitoring across the seagrass grounds it depends on. Breeding follows a single pup born to a female after a gestation of around eighteen months. The pup is buccolactated through a dependency close to three years and stays with its mother through that stretch while it learns the mixed work of grazing, sifting, and hunting that the species lives by. Females breed at intervals of six to eight years and lifespans run to around 150 to 170 years in the wild.

Bolted Tiko (Thanatocharchara skairos)

The bolted tiko is one of the smaller and sleeker members of the genus Thanatocharchara at around 8 to 9 metres (26 to 30 feet) and it's built lean and fast for a life ranging the open temperate waters of the Pacific. It takes its common name from the pair of pale lightning-bolt markings that run down each flank against a body that's otherwise black from end to end and the dark countershaded colouring hides it well in the open blue water it hunts through. Like the rest of the genus it carries a fat-rich crest atop the head and a sloping hump along the back though both sit low and streamlined in this species to cut drag and the modest crest is the smallest in the genus. What stands out on the build is the neck since the bolted tiko carries the thickest neck of any Thanatocharchara and that heavy muscled neck drives the short violent strikes the species hunts with. It runs down schooling fish and squid in fast bursts across the open water and the lean body and powerful neck make it the sprinter of a genus better known for slow solitary giants. The bolted tiko keeps to the solitary life of the genus through most of the year though it's known for the long feeding migrations it makes between the productive zones of the temperate Pacific and those migrations are one of the few times members of the genus gather in any numbers. On migration the animals fall in along the shipping routes that cross the open ocean and the bolted tiko is famous among the crews for riding the wakes of their vessels where it lifts the head and part of the long neck clear of the water as it swims behind a hull. The sight of a black serpentine head and neck trailing a ship across empty water fed the sea-serpent stories that ran through the logs and the folklore of the open-ocean sailors for centuries. The bolts down its flanks flash as the animal turns and they read as fast signals between animals in the migratory gatherings where the species is at its most social and its most lively. Individuals breach and leap clear of the surface in the bursts of play that gave the species its darting scientific name. The diet runs on the schooling fish and squid of the open water taken in the fast pursuit the build is made for and the splayed tiko dentition holds the catch once the jaws close. The migratory life that draws the bolted tiko along the shipping lanes also puts it in their path and vessel strikes are a steady pressure on the species. The animals turn up as bycatch in the open-ocean fisheries that work the same waters. The feeding gatherings made the species an easy target through the hemoling era since hunters could take many animals at once where they congregated. The numbers fell hard through the 1800s and into the twentieth century. The 1967 hemoling ban ended that hunting and the population has climbed back over the decades since though vessel strikes and bycatch keep the recovery slow. The bolted tiko sits at vulnerable today and the Pescanguid Research Institution tracks the migratory routes and the gatherings along them. Breeding produces a single pup born after a gestation of around fifteen months and the pup is buccolactated through a dependency of around two and a half years while it travels the migration routes at its mother's side and learns the open-water hunting the species lives by. Females breed at intervals of five to seven years and lifespans run to around 120 to 140 years in the wild.

Kyber Tiko (Thanatocharchara camelogibbosus)

Bowhead Tiko (Thanatocharchara margaritina)

The bowhead tiko is one of the mid-sized members of the genus Thanatocharchara at around 10 to 11 metres (33 to 36 feet) and it lives in the high Arctic along the marginal ice zones where the pack ice breaks up into open leads. It takes its common name from the curving shape of its extended lower jaw where the tip bends downward into a line that looks like the bow of an archer. The bow is more pronounced in the males which points to a part in mating though the purpose isn't settled. The species name marks its colour since the adults turn pale and almost white with the dark patterning of the genus faded to a ghost of itself and a pearl-like opalescence over the skin that gives the animal its haunting look at the ice edge. Like the rest of the genus it carries a fat-rich crest atop the head and a sloping hump along the back. In the bowhead tiko the crest is denser and more heavily reinforced than the soft fatty crests of its relatives. It puts that reinforced crest to work as a tool and rams and breaks the thin sea ice to open and hold the breathing holes it needs and to reach the prey sheltering under the ice. It shoves and stacks floes and broken ice as it works a patch. This sets it among the tikos that reshape the world they live in and gives the genus a worker in a polar register next to the kyber tiko's ploughing of the southern shelves. The bulk runs to thick insulation against the cold and the build stays heavy and rounded under the ice. The diet centres on the under-ice fish and cephalopods and the slower cold-water prey that gather along the leads and the underside of the floes. The splayed tiko dentition grips and holds the catch once the jaws close. The species keeps to the solitary life of the genus for most of the year though the bowhead tiko is the genus's voice and it produces long carrying calls of groans, whistles, and hums that travel under the ice for great distances. Those calls are the source of the siren songs that run all through the folklore of the northern seas and coastal peoples have known the pale singer at the ice edge for as long as their stories reach. The bowhead tiko has been known to people since long before science came to name it. Its range overlaps the subarctic and Arctic waters the arctic tiko and the parroting dolo work and it falls under the same Arctic legal frameworks that protect those waters. Hemoling-era hunting reached the bowhead tiko through the 1800s and into the twentieth century though the remote ice-bound range sheltered it from the worst of the pressure that fell on the surface species of warmer seas. The 1967 hemoling ban eased what hunting remained. The growing threat now is the loss of the sea ice the species is built around since the retreat of the pack ice strips away the habitat the bowhead tiko hunts and breaks and breathes along. The species sits at near threatened today and drifts toward vulnerable as the ice continues to go. The Pescanguid Research Institution tracks the population against the shrinking ice and the bowhead tiko is the longest-lived member of the genus with a slow climb to maturity and a slow rate of breeding behind that long life. Breeding produces a single pup born after a gestation of around eighteen months and the pup is buccolactated through a dependency close to three and a half years while it learns the ice and the calls and the work of the species at its mother's side. Females breed at intervals of eight to ten years and lifespans run to around 180 to 220 years in the wild.

Haunter Tiko (Sausagefish) (Thanatocharchara mysticollia)

The haunter tiko is one of the larger members of the genus Thanatocharchara at around 12 metres (39 feet) and it's the deep-diving heavyweight of the genus that works the coldest reaches of the open ocean and easily one of the strangest members of the entire genus. It takes its common name from the long carrying calls of groans, whistles, and hums that travel through the deep for great distances and give the unseen animal a haunting voice out of water nobody can see into. Those calls have fed the folklore of ghostly voices in the deep for as long as sailors have crossed the open sea. Adding to its haunting nature, the body is ghostly pale and almost white from end to end and the fat that the genus carries on the head and back sheathes the whole animal here so the neck disappears under the layers and the body reads as one unbroken form, this has lead many to also refer to the animal as the sausagefish. The pale unbroken shape adds as much to the ghost reputation as the calls do. The crest atop the head swells into a dense lipid mass that serves the long dives as a buoyancy and sound organ and the pectoral paddles run wider and longer than the posterior pair and give the animal its control through the deep water column, often compared to ghostly wings. A single long curved tusk enxtends outward from the extended lower jaw found in both tiko genera. This tusk extends at the tip and runs one to two metres (3 to 6 feet) in a grown animal and a healthy tusk is known by the slight upward curve at its end. The haunter tiko uses the tusk to joust with its own kind, to display, and to defend itself against the neodracodon hemots it crosses in the deep. The mouth is the widest of any tiko and the haunter tiko puts that wide gape to work as it feeds by suction and opens the broad mouth to pull squid and cold deep fish straight in on the rush of water. It also takes the largest deep ammoteuthids the way few animals can and contests the neodracodon hemots over the giant prey both pursue. The fights over that prey and the clashes with the neodracodons leave the scars the animal wears across its pale hide. The haunter tiko dives below the range of the bumphead tiko and works the deep cold column where the squid and the giant cephalopods live and the tiko shark can't follow it down there so a grown haunter tiko has almost nothing to fear. The haunter tiko breaks the solitary rule of its genus and lives in fleets of around five to ten animals of both sexes that hold together over time and, along with the pygmy tiko, it's one of the only two Thanatocharchara that lead a primarily social life. The fleet rests by hanging motionless and upright in the water column and the bodies float vertical and still. The haunter tiko is met most often around dusk and dawn when the fleets rise toward the surface. The upright sleeping gave the species its second claim to a ghost reputation. The early explorers who came upon a fleet floating vertical and still took the animals for dead and read the silent upright shapes as a fleet that had died together and still hung in the water, their spirits persisting where they once were in life. The sight grew into the ghost tiko of open-ocean folklore and the legend held them to be the restless spirits of dead haunters still tethered to their fleet and floating in the uncanny vertical line that no living animal seemed to hold. The deep range keeps the haunter tiko out of human reach and made them less of a target during the hemoling era, though the species is still so rarely seen and so poorly known that no one can put a confident number on its population. The Pescanguid Research Institution works mostly from the calls it can record, the occasional sightings in the northern oceans at dawn, and the rare carcasses that wash ashore since direct study of the living animal in the deep stays beyond reach. Breeding sets the haunter tiko apart from the other tikos since the females bear twin pups at a time where the rest of the family carries one. Gestation lasts around eighteen months and the twins are buccolactated together through a dependency close to three years. The female puts out a heavier flow of buccolactation than other tikos to carry two young at once and the wide mouth earns its second keep here since the broad oral cavity holds the larger glandular area the heavier output draws on. Females breed at intervals of six to eight years and lifespans are believed to around 140 to 160 years in the wild.

Janet’s Tiko (Thanatocharchara janetae)

Janet's tiko is the smallest member of the genus Thanatocharchara and the smallest tiko across both tiko genera at body lengths of around 3 to 4.5 metres (10 to 15 feet). It takes its common name from the naturalist Janet Fosters who recorded its full breaching in the 1850s and Fosters was the first to credit a behaviour that earlier observers had brushed off and her notes landed within a couple of years of Du Chaillu's bumphead carcass so the genus picked up a clustered run of mid-century description. Like the rest of the genus it carries a crest atop the head and a sloping hump along the back. The colouring runs an icy blue scattered with white spots and the standout mark is a single large black spot that sits above each eye and reads as a great false eye. Both false eyes sit on the head crest and that crest is the part built to take the damage. The crest is the most heavily reinforced and densely built of any in the genus and it works as a shield more than a fat store. Heavy predation drives the whole arrangement since sharks and large sea turtles both hunt the small Janet's tiko. A predator drawn in by the false eyes strikes the crest and the dense reinforced tissue takes the blow while the real head behind it comes away safe. The breaching that Fosters set down works the same defensive end since the species throws its whole small body clear of the water in hard leaps that can shake a shark or a turtle closing in. It feeds as a small opportunistic forager on the small fish, squid, and crustaceans of the cold northern seas and the splayed tiko dentition holds the catch once the small jaws close. Janet's tiko keeps to the colder Arctic and subarctic waters where it works the upper water column near the surface and the cold-water fishermen of those seas meet it across its range. Hemoling-era hunters paid the small Janet's tiko little attention through the 1800s where the larger crested tikos drew the take and the species came through that era in better shape than its cousins. The pressures now are the bycatch it falls to in the cold-water fisheries that cross its range and the warming of the northern seas that shifts the cold water it depends on. The species sits at near threatened today and the Pescanguid Research Institution tracks its numbers across the cold northern range. Breeding produces a single pup born after a gestation of around twelve months and the pup is buccolactated through a dependency close to two years which is the shortest in the genus and fits the fast turnover of a small heavily hunted animal. Females breed at intervals of four to six years and lifespans run to around 80 to 90 years in the wild.