Page "Shark" Paragraph 23

* Carcharhiniformes: Commonly known as groundsharks, the species include the blue, tiger, bull, grey reef, blacktip reef, Caribbean reef, blacktail reef, whitetip reef and oceanic whitetip sharks ( collectively called the requiem sharks ) along with the houndsharks, catsharks and hammerhead sharks.

They are distinguished by an elongated snout and a nictitating membrane which protects the eyes during an attack.