The  oceans produce about 70% of the oxygen we breathe! Everybody say, "THANK YOU OCEANS!!"

Some fish (most sea-life, really) actually sleep with only half of their brain switched off at a time- they stay alert to danger! It's called unihemispheric sleep. Sharks are similar, but in their case most species of shark must swim constantly, even during sleep w (poor guys), in order to keep oxygen filled water flowing over their gills! 

Much like fish, but also quite different, chin-strap penguins nod off 10,000 times a day- about 600 naps an houre (4 second micro-sleeps) and it all adds up to more than 11 hours of sleep!! They do this so they can keep an eye on their nests, and protect their eggs and chicks from predators. 

Penguins don't have any time where they decrease their vigilance:( (penguins invented anxiety, actually - real /j).

At times, chinstrap penguins will sleep for longer, but only unihemispheric- they can literally sleep with one eye open, resting one hemisphere of their brain at a time! They are able to transition seamlessly between wakefulness, and right-side brain sleep, left-side brain sleep, or whole brain sleep.

The name 'Pacific Ocean' (Largest ocean in the world, covering 30% of the Earth's surface) comes from the Latin name 'Tepre Pacificum', which means peaceful sea:)) It was named by the explorer Ferdinand Magellan, in 1520, as he sailed through a calm patch of water on the ocean. Till date, the Pacific Ocean is the calmest around, so good job to Ferdinand! Solid name, 10/10.

There are more artefacts and remnants of history in the ocean than in all of the worlds museum combined !! For this reason, it can be described as the ✧Planet's mega museum ✧ !

Sharks can't get cavities! 

They're really great at brushing their teeth so they just can never get cavities ever:) /j

The real reason is because their  teeth are coated in fluoride, keeping them safe from decay!

Bonus  shark teeth fact: they can shed more than 30,000 teeth over their lifespans! The teeth they lose quickly get replaced, as they have several rows of teeth behind their first row of chompers that lay flat inside their moths as a backup until a tooth is shed, and it's time to fill in the gap!

Speaking of teeth, a shark's skin is more like teeth than fish scales! Their skin may look smooth (skin care routine when?), but is actually made up of tiny v-shaped scales, also called dermal denticles, which are made of an inner pulp cavity and an outside layer of dentine, an enamel like material. Because of this, when a shark loses a denticle, it can actually fossilise over time, just like shark teeth!! Adding to the scale's cool factor, they also help sharks swim faster and more stealthily when hunting for prey!

Sharks do not have vocal chords :0. They are silent animals.

I will now give you random sea-animal + ocean facts stored in my brain B)

Sea Animal

The Dwarf pygmy goby is smallest fish in the world is 0.3 inches long & the pea crab is the smallest crab in the world- female pea crabs measure 0.5 inches across at their largest, and male pea crabs are less than 0.3333 inches wide. (they are the littlest guys).

Oysters can change gender (and back again) based on what is best for mating (The OG genderfluid icons o7).

Catfish have 100,000 taste buds.

The sailfish is the fastest fish in the sea! It can reach speeds of up to 68 miles per hour- NYOOOOOOM

A group of jellyfish is called a smack.

A shrimp’s heart is in its head! ("Think with your brain not your heart" Her heart is literally bigger than her brain (its so tiny) what do you want her to do ☹️ )

Although most species of caridean shrimps have separate sexes, a fair number are sequential hermaphrodites- spends the early part of its adult life as a male and then changes into a female for the rest of its lifetime. (trans icons o7)

Lobsters can live up to 50 years.