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swim bladder.

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Gonzalo Abernathy

Lvl 13
2y ago
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13y ago

All fish, by definition, have bony skeletons. A sharks skeleton is completely made of cartilage - there is no calcification in their skeleton. So fish have bony skeletons, sharks have cartilaginous skeletons.

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Wiki User

12y ago

bones

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Q: What organ do sharks not have that bony fish have?
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