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They are generally less than 1 m in length, and are slow-moving predators that feed on bony fish and small invertebrates. Although some bear live young, the majority lay eggs with almost fully developed young; these egg cases, known as "mermaid's purses" , are unique in appearance to each species.
Catshark may refer to: Scyliorhinidae , a family of ground sharks , many species of which are commonly referred to as "catshark". Pentanchidae , a family of ground sharks with the overall name deepwater catsharks, but many species are referred to as "catshark".
Catshark egg (mermaids' purse) Scyliorhinidae includes many species of catsharks, that like the chain dogfish, are oviparous and lay eggs in tough egg cases with curly tendrils at each end, known as "mermaid's purses", for protection, onto the seabed. [15] Almost a year is needed for a catshark to hatch from the egg.
Doing so causes the shark to enlarge in diameter and makes it much harder for predators to bite or dislodge. [2] [4] The swell shark is capable of swelling by using water or air, which is stored in the stomach until released. [2] [4] When letting air out, the swell shark makes a dog-like bark.
The mud catshark or brown catshark (Bythaelurus lutarius) is a species of shark belonging to the family Pentanchidae, the deepwater catsharks. It is found in Mozambique and Somalia . Its natural habitat is the open seas of the western Indian Ocean , from Mozambique to Somalia , between latitudes 13° N and 29° S , at depths between 340 and 765 m.
Haploblepharus is a genus of deepwater catsharks, belonging to the family Pentanchidae, containing four species of shysharks.Their common name comes from a distinctive defensive behavior in which the shark curls into a circle and covers its eyes with its tail.
The leopard catshark (Poroderma pantherinum) is a species of catshark, and part of the family Scyliorhinidae, endemic to the coastal waters of South Africa. Abundant in inshore waters under 20 m (66 ft) deep, this bottom-dweller favors rocky reefs , kelp beds , and sandy flats.
The draughtsboard shark (Cephaloscyllium isabellum) is a species of catshark, and part of the family Scyliorhinidae, so named for its "checkerboard" colour pattern of dark blotches. It is endemic to New Zealand , where it is also known as the carpet shark (which usually refers to the entire order Orectolobiformes ). [ 2 ]