No pectoral or pelvic fins, only one dorsal, caudal and anal fin.
No scales, the body is covered with a protective mucus.
This moray eel is solitary, but it often stays with cleaning shrimp with which it shares its meals and offers protection in exchange for deworming.
Mammals have a horizontal tail.
Fishes have a vertical fin.
The whale shark is the largest fish in the world!
Some whales are larger, but they are mammals, not fish!
Turtles are in economy mode when they are sleeping. If they are woken during night, they may not have enough air to return to surface.
So, please be careful during night dives!