Ophidiidae - cusk-eels

Cusk eels have elongate eel-like bodies with long dorsal and anal fins that are continuous with the caudal fin. They are generally shorter and more robust than other eels. Their pelvic fins are place far forward on the body, sometimes under the chin and consist of one to two filamentous rays each. Most are nocturnal, deep-water fishes. Only a few are found in shallow waters where they hide in crevices or burrow in the mud during daylight hours.