The shortnose demon catshark (Apristurus internatus) is a catshark of the family Scyliorhinidae found only in deep water in the East China Sea. Its length is up to 40 cm. A. internatus is known only from the holotype (a 49.1-cm-total length female) and a paratype (a 40.3-cm male), both caught in the East China Sea, probably taken as bycatch in deepwater trawl fisheries. Insufficient information is available to assess this species' conservation status. The reproduction of this catshark is oviparous.
|Shortnose demon catshark|
S. M. Deng, G. Q. Xiong & H. X. Zhan, 1988
Apristurus is a genus of catshark, the family Scyliorhinidae, commonly known as the ghost or demon catsharks.List of data deficient fishes
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 3191 data deficient fish species. 21% of all evaluated fish species are listed as data deficient.
The IUCN also lists 12 fish subspecies as data deficient.
Of the subpopulations of fishes evaluated by the IUCN, 34 species subpopulations have been assessed as data deficient.
This is a complete list of data deficient fish species and subspecies evaluated by the IUCN. Species and subspecies which have data deficient subpopulations (or stocks) are indicated.List of sharks
Sharks belong to the superorder Selachimorpha in the subclass Elasmobranchii, in the class Chondrichthyes. The Elasmobranchii also include rays and skates; the Chondrichthyes also include Chimaeras. The first sharks appeared in the oceans over 440 million years ago.
Listed below are extant species of shark. Sharks are spread across 512 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in alphabetical order. Also included is a field guide to place sharks into the correct order.