Notacanthidae

Deep-sea spiny eels Temporal range: Late Cretaceous–Recent PreЄ Є O S D C P T J K Pg N [1]
Snubnosed spiny eel, Notacanthus chemnitzii.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Notacanthiformes
Family:	Notacanthidae
Genera
Lipogenys Notacanthus Polyacanthonotus

The deep-sea spiny eels are a family, Notacanthidae, of fishes found worldwide below 125 metres (410 ft), and going as deep as 3,500 metres (11,500 ft).

Their bodies of deep sea spiny eels are greatly elongated, though more tapered than in true eels. The caudal fin is small or nonexistent, while the anal fin is lengthy, as long as half of the total body length. They feed on animals attached to or living on the sea floor, such as sea anemones, echinoderms, molluscs, and worms.^[2]

Although they are not true eels, these fish do have a similar leptocephalus larva. However, while the larvae of true eels are about 5-10% of the length of the adult, those of deep sea spiny eels can grow considerably larger than the adult, and shrink when they develop into their final form. Thus, while adults range from 20 centimetres (7.9 in) to 1.2 metres (3.9 ft) in length, larvae of up to 1.8 metres (5.9 ft) have been recorded.^[2]

References

1. ^ Froese, Rainer, and Daniel Pauly, eds. (2011). "Notacanthidae" in FishBase. June 2011 version.
2. ^ ^{a b} McCosker, John F. (1998). Paxton, J.R. & Eschmeyer, W.N.. ed. Encyclopedia of Fishes. San Diego: Academic Press. p. 86. ISBN 0-12-547665-5.