Requiem shark

From Wikipedia, the free encyclopedia
  (Redirected from Requiem sharks)
Jump to: navigation, search
Requiem sharks
Temporal range: Early Cretaceous to present
Tiger shark.jpg
A tiger shark, Galeocerdo cuvier
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Carcharhiniformes
Family: Carcharhinidae
D. S. Jordan & Evermann, 1896
Blacktip reef shark, Carcharhinus melanopterus
Spinner shark, Carcharhinus brevipinna, from the Gulf of Mexico
Galapagos shark, Carcharhinus galapagensis
Lemon shark, Negaprion brevirostris, at Tiger Beach, Bahamas
Blue shark, Prionace glauca

Requiem sharks are sharks of the family Carcharhinidae in the order Carcharhiniformes, containing migratory, live-bearing sharks of warm seas (sometimes of brackish or fresh water) such as the spinner shark, the blacknose shark, the blacktip shark, the blacktail reef shark, and the blacktip reef shark.

The name may be related to the French word for shark, requin, which is itself of disputed etymology. One derivation of the latter is from Latin requiem ("rest"), which would thereby create a cyclic etymology (requiem-requin-requiem), but other sources derive it from the verb reschignier ("to grimace while baring teeth").

Family members have the usual carcharhiniform characteristics. Their eyes are round, and one or two gill slits fall over the pectoral fin base. Most species are viviparous, the young being born fully developed. They vary widely in size, from as small as 69 cm (2.26 ft) adult length in the Australian sharpnose shark, up to 5.5 m (18 ft) adult length in the tiger shark.[1]

Requiem sharks are responsible for a large proportion[clarification needed] of attacks on humans; however, due to the difficulty in identifying individual species, a degree of inaccuracy exists in attack records.[2]

Classification[edit]

The 60 species of requiem shark are grouped into 12 genera:[1]

† = extinct

See also[edit]

References[edit]

  1. ^ a b Compagno, L.J.V. Family Carcharhinidae - Requiem sharks in Froese, R. and D. Pauly. Editors. 2010. FishBase. World Wide Web electronic publication, version (10/2013).
  2. ^ ISAF Statistics on Attacking Species of Shark Archived July 24, 2009, at the Wayback Machine.

External links[edit]