- Common aquatic animals include whales, seals, stingray, sea horse, angler fish, sea cows, sea lions, beaver, dolphins, sharks, otters, platypuses, and jellyfish.
- An electric eel is known to produce electricity sufficient enough to light 10 electric light bulbs.
- An octopus has three hearts and blue blood.
- Oysters can change from one gender to another and back again depending on which is best for mating.
- A shrimp's heart is in it's head.
- Dolphins sleep with only half of their brain and with one eye open so they watch for predators and other threats.