The charriot of Poseidon (Sousse Archaeological Museum).
Syngnathids (i.e., seahorses, pipefish, pipehorses and seadragons) belong to a large family of teleost fish (Syngnathidae), with 57 genus and approximately 300 species, that primarily inhabit shallow marine, brackish and freshwater habitats. Their extraordinary life histories, and particularly their truly unique mode of reproduction (male pregnancy), have long converted syngnathids into model organisms to address a diverse array of questions related to sexual selection and the evolution of reproductive complexity.
Historically embedded into European mythology, seahorses were thought to protect the souls of dead sailors transitioning into the underworld or viewed as the offspring of Poseidon’s steeds. Today, seahorses and their close relatives have transformed into powerful AMBASSADORS FOR MARINE CONSERVATION and PROMOTERS OF OCEAN LITERACY.
image: Roberto Pillon (licensed under http://creativecommons.org/licenses/by-nc/4.0/)
image: Pauline Walsh Jacobson (licensed under http://creativecommons.org/licenses/by/4.0/)
image: Coffin Bay Scuba Co. (licensed under http://creativecommons.org/licenses/by-nc/4.0/)
In a Project Seahorse initiative, including members of the IUCN SSC SPS SG, the worldwide active legislation for syngnathids was recently reviewed revealing that most European countries do not have syngnathid-specific regulations. The efficacy of the current rules and laws to protect syngnathids can only be ascertained if wild populations are monitored. Our ignorance about the current population status of most European syngnathids reflects the dearth of monitoring efforts for these fishes.
Back-finned pipefish - Cosmocampus retropinnis
Snake pipefish - Entelurus aequoreus
West African seahorse - Hippocampus algiricus
Lined seahorse - Hippocampus erectus
Long-snouted seahorse - Hippocampus guttulatus
Short-snouted seahorse - Hippocampus hippocampus
Minyichthys sentus - Minyichthys sentus
Worm pipefish - Nerophis lumbriciformis
Spotted pipefish - Nerophis maculatus
Straightnose pipefish - Nerophis ophidion
Black-striped pipefish - Syngnathus abaster
Greater pipefish - Syngnathus acus
Pelagic pipefish - Syngnathus phlegon
Nilsson's pipefish - Syngnathus rostellatus
Schmidt's pipefish - Syngnathus schmidti
Darkflank pipefish - Syngnathus taenionotus
Narrow-snouted pipefish - Syngnathus tenuirostris
Broadnosed pipefish - Syngnathus typhle
Thickly snouted pipefish - Syngnathus variegatus
Hippocampus guttulatus - image: Miguel Correia (licensed under http://creativecommons.org/licenses/by/4.0/)
Present-day syngnathid diversity along the European coast, resulting from the sum of all nineteen syngnathid ranges (colour scale highlights the number of sympatric species).
To uphold the health of its seas, Europe committed to protect 10% of its coastal and marine areas by 2020 (Aichi Target 11, Convention on Biological Diversity), while recognizing that a larger area was required, especially in the Macaronesia region and the Mediterranean Sea. Now, the EU Biodiversity Strategy has set the goal of protecting 30% of its sea by 2030. Even considering this coverage, there is concern that climate change may weaken the protective value of marine protected areas (MPAs), especially given the static boundaries of most. As some European syngnathids are largely shifting their ranges northwards, adaptive management approaches become imperative, especially those that include governance arrangements stimulated by stakeholder participation and cross-sector collaboration.
Syngnathid diversity in 2100, under a 'business as usual' climate change scenario (blue: areas where the number of syngnathid species will decrease; red: areas where the number of syngnathid species will increase). The Mediterranean, Black and Baltic seas will be especially impacted by warming water temperatures.