Cow sharks are considered the most primitive of all the sharks, as their skeletons resemble those of ancient extinct forms, with few modern adaptations. Their excretory and digestive systems are also unspecializ… See more

Cow sharks are ovoviviparous, with the mother retaining the egg cases in her body until they hatch. They feed on relatively large fish of all kinds, including other sharks, as well as on crustaceans and carrion. … See more

The only fossil records of the cow shark consist of mainly only isolated teeth. Although skeletal remains for this species have been found from the Jurassic time period, these have been very rare and have only been f… See more

The 37 species of cow shark (four of which are extant), in 10 genera, are:
• †Gladioserratus Underwood, Goswami, Prasad, Verma & Flynn, 2011
• Heptranchias Rafinesque, 1810 … See more

• ReefQuest Centre: Order Hexanchiformes: Cow Sharks See more