A cusk eel finding shelter under coral takes refuge in a crevice, under an umbrella of gorgonian corals.
Above all else the small eel-like fish has a tapering body and its fins form a pointed tail, typically found in deep water. They are found in temperate and tropical oceans throughout the world.
They live close to the bottom of the sea floor, ranging from shallow water to the hadal zone. One species, also was recorded at the bottom of the Puerto Rico trench, making it the deepest recorded fish at 8,370 m (27,460 ft).