eel

There are about 100 species of moray eels found throughout tropical and temperate seas. They generally lurk in rocky crevices from where they can ambush their prey, usually hunting by night. Some morays can reach over 4 m/13 ft in length and, because of their aggression, are considered dangerous to divers.

Any fish of the order Anguilliformes. Eels are snakelike, with elongated dorsal and anal fins. They include the freshwater eels of Europe and North America (which breed in the Atlantic), the marine conger eels, and the morays of tropical coral reefs.

The gulper eel, Eurypharynx pelecanoides, is found in all the world's oceans to depths of 3,000 m/9,800 ft. It has a huge mouth and a long whiplike tail, and can reach up to 2 m/6.6 ft in length.