Snailfish or Sea snail is world’s deepest living fish. Any of concerning 115 types of sea fish often located with the lumpsuckers in the family Cyclopteridae, but sometimes alienated as a separate family, Liparidae (order Scorpaeniformes). Snailfish are tiny, rising to a maximum length of about 30 centimetres (12 inches). They are lengthened, soft, tadpole-shaped fish with slack and scaleless, although sometimes spiky, skins. There is a long dorsal fin on the back and typically a sucking disk under the head. The disk is shaped from the pelvic fins and is used for add-on to the base. Snailfish live in complete darkness.
Snailfish can be found in cold water – in the North Atlantic and North Pacific and the Arctic and Antarctic seas. Some snailfish can be found in shore waters – North Atlantic. Others, like pink-coloured types of the genus Careproctus, live in the deep sea.