(strictly) Electrophorus electricus, a species of fish resembling an eel (though not related) that is capable of generating powerful electric shocks. / (broadly) Any species of the genus Electrophorus.

Any of various brightly colored marine eels of the family Muraenidae, of warm coastal waters.

Any of various large marine eels of the family Congridae, having no scales and found in temperate and tropical coastal waters.

A dish of eels, cooked and then allowed to cool in their own juices.

(simile, colloquial) So slippery that it is almost impossible to hold. / (idiomatic, simile, colloquial) Very crafty or cunning.

The nematode worm that causes earcockle.

plural of wheat-eel

plural of Japanese eel

Any of various species of slim fish, resembling eels, especially of the family Ammodytidae.

plural of conger eel