Do all fish have a swim bladder, explain the answer.
| December 19, 2020 | education
Only bony fishes have a swimbladder; cartilaginous ones do not. This is due to the fact that the cartilaginous skeleton of cartilaginous fishes is lighter than the bony skeleton of bony fishes, therefore they have neutral buoyancy. It is easier for them to ascend and dive using their fins. But also among the cartilaginous fish there are bottom inhabitants, for example, stingrays.
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