Question

all fishes have swim bladder or no

Answer 1

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YES of course all fishes have swim bladders inorder to move from one place to another.

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Answer 2

hey buddy !! here's your answer...

fishes are divided into two classes -- chondrichthyes and ostichthyes

➡️chondrichthyes -- these fishes don't have swimming bladder and have to swim continuously so that they don't sink .ex ... sting ray , electric ray

➡️ostichthyes -- tgey have swimming bladder hence don't need to swim continuously.
ex . fighting fish , rohu

hope it helps !! ✌️❤️