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These sharks lack the anal fin which distinguishes it from all other sharks. The other two orders without anal fins are either raylike in appearance or have blade snouts. Some are humpbacked sharks, and are presumed to be all ovoviviparous.
Note: The world's smallest shark is included within this order.
FAMILY Echinorhinidae| Echinorhinus brucus | Bramble Shark |
| Echinorhinus cookei | Prickle Shark |
| Oxynotus brunensis | |
| Oxynotus caribbaeus | |
| Oxynotus centrina | Angular Roughshark |
| Oxynotus paradoxus | Humantin |
| Aculeola nigra | |
| Centrophorus acus | |
| Centrophorus granulosus | Gulper Shark |
| Centrophorus harrisoni | |
| Centrophorus lusitanicus | |
| Centrophorus moluccensis | |
| Centrophorus niaukang | Taiwan Gulper Shark |
| Centrophorus squamosus | |
| Centrophorus tessellatus | |
| Centroscyllium fabricii | Black Dogfish |
| Centroscyllium granulatum | |
| Centroscyllium kamohare | |
| Centroscyllium nigrum | Pacific Black Dogfish |
| Centroscyllium ornatum | |
| Centroscyllium ritteri | |
| Centrocymnus coelolepis | Portuguese Shark |
| Centrocymnus crepidater | |
| Centrocymnus cryptacanthus | |
| Centrocymnus macracanthus | |
| Centrocymnus owstoni | |
| Centrocymnus plunketi | |
| Cirrhigaleus barbifer | |
| Dalatias lichia | Darkie Charlie or Kitefin |
| Deania calea | Birdbeak Dogfish |
| Deania histricosa | |
| Deania profundorum | |
| Deania quadrispinosum | |
| Etmopterus baxteri | |
| Etmopterus brachyurus | |
| Etmopterus bullisi | |
| Etmopterus carteri | |
| Etmopterus decacuspidatus | |
| Etmopterus gracilispinis | Broadband Dogfish |
| Etmopterus granulosus | |
| Etmopterus hillianus | |
| Etmopterus lucifer | |
| Etmopterus perryi | |
| Etmopterus polli | |
| Etmopterus princeps | Great Lanternshark |
| Etmopterus pusillis | Smooth Lanternshark |
| Etmopterus schultzi | |
| Etmopterus sentosus | |
| Etmopterus spinax | Velvet Belly |
| Etmopterus unicolor | |
| Etmopterus villosus | |
| Etmopterus virens | Green Lanternshark |
| Euprotomicroides zantedschia | |
| Euprotomicrus bispinatus | |
| Heteroscymnoides marleyi | |
| Isistius brasiliensis | Cookie-Cutter Shark |
| Isistius plutodus | |
| Scymnodalatias sherwoodi | |
| Scymnodon obscurus | |
| Scymnodon ringens | |
| Scymnodon squamulosus | Velvet Dogfish |
| Somniosus microcephalus | Greenland Sleeper Shark |
| Somniosus pacificus | pacific Sleeper Shark |
| Somniosus rostratus | |
| Squalious laticaudus | |
| Squalus acanthias | Spurdog, Piked or Spiny Dogfish |
| Squalus asper | Roughskin Spiny Dogfish |
| Squalus blainvillei | Blainville's Dogfish |
| Squalus cubensis | Cuban Dogfish |
| Squalus japonicus | Japanese Spurdog |
| Squalus megalops | |
| Squalus melanurus | |
| Squalus mitsulurii | |
| Squalus rancureli |
