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CBSE Class 11-science Answered

Why do cartilaginous fish swim constantly?
Asked by Topperlearning User | 10 Jul, 2014, 01:31: PM
Expert Answer

An air bladder is absent in cartilaginous fish. Cartilaginous fish swim constantly in order to prevent themselves from sinking.

Answered by | 10 Jul, 2014, 03:31: PM

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