Source: FAO 2013.
| Family | Scientific Name | Author | Year | Common Name |
| Chimaeridae | Hydrolagus affinis | (de Brito Capello) | 1868 | Deepwater Chimaera |
Unique Characteristics: A very large Hydrolagus with the oral and preopercular lateral lines sharing a short, common branch. First dorsal–fin spine not exceeding fin height, second dorsal–fin height relatively even along entire fin length, and a short (less than body length) tail filament. Caudal dorsal–fin height greater than caudal ventral fin height. Eye diameter more than 5 times in head length. Body colour dark black or purplish black (FAO 2013).
Similar Species: None
Reference:
(FAO 2013) Ebert, D.A. and M.F.W. Stehmann. 2013. Sharks, batoids, and chimaeras of the North Atlantic. FAO Species Catalogue for Fishery Purposes. No. 7. Rome, FAO. 523 pp.