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what is the habitat of cartalaginous fish

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Anieeid
Most cartilaginous fishes live in marine habitats all their lives, but a few species of sharks and rays live in freshwater during all or part of their lives. 
Anniecaid
Cartilaginous fish is a fish that there skeletons are made of cartilage.
shark and rays are cartilaginous fish.
they live under deep ocean in fresh and salt water.
there mainly habitat are places near equator, they live in warm water, in order to obtain energy from the sun and warm up.

trivia: Sharks had no skeleton there bones are made of cartilage.