moray eels have two sets of jaws. groupers will often hunt with eels, chasing fish into areas they cant reach into and alerting the eel to the spot. some eels can hunt out of water. there's a dam somewhere with specially sized rotating thingies inside that the eels can safely fit through while theyre traveling for sex. electric eels are more closely related to catfish than true eels. most eels have poor eyesight.