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Family of cartilaginous fishes / From Wikipedia, the free encyclopedia

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Members of the family Narkidae are commonly known as sleeper rays. They are restricted to the temperate and tropical Indo-West Pacific from South Africa to Japan to Indonesia, and are exclusively marine and are absent from freshwater habitats. They occur from the intertidal zone to the continental shelf and the upper continental slope to a depth of 350 meters, favoring soft-bottomed habitats.

Quick facts: Sleeper rays, Scientific classification ...
Sleeper rays
Onefin electric ray
(Narke capensis)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Torpediniformes
Family: Narkidae
Fowler, 1934