cartilaginous fish

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Fish in which the skeleton, including the skull and jaws, consists entirely of cartilage and never, even in the adult stage, comprises bony tissue. Sharks and rays (Chondrichthyes) have a cartilaginous skeleton, as have other lower vertebrates, e.g. the jawless lampreys and hagfish (Agnatha).

Subjects: Zoology and Animal Sciences — Earth Sciences and Geography.

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