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.
The kakihona sushi (sushi wrapped in persimmon leaves) are really the best!
To eat them, you have to go to Nara!
Some sharks can stay motionless on the sand (white tips reef sharks, nurse sharks, etc.).
These sharks don't have to swim to bring oxygen to their gills like other sharks (grey, hammerheads tc.)
The whale shark is the largest fish in the world!
Some whales are larger, but they are mammals, not fish!