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  4. Swim bladder is present in

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Q. Swim bladder is present in

AMUAMU 2005

Solution:

Bony fishes (Osteichthyes) are cartilaginous in embryonic stage but in aduly form more or less it is replaced by bones. A swim bladder is present in these fishes, which helps in floating.
Star fish is not a fish. It is an echinoderm, so swim bladder is absent in these.
Carp fish is a freshwater food fish.