Question

If a fish wants to stay buoyant in the water, what structure does it use?

- cartilage

- a lateral line system

- gills

- a swim bladder

Answer 1

If a fish wants to stay buoyant in the water, it will use its swim bladder. The swim bladder is an internal gas-filled organ that contributes to the ability of bony fish to stay buoyant in the water.


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