Question

_______ is filled with air and keeps the fish afloat.​

Answer 1

Answer:

Ocean  is filled with air and keeps the fish afloat.​

Explanation:

Answer 2

Answer:

The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ that contributes to the ability of many bony fish (but not cartilaginous fish) to control their buoyancy, and thus to stay at their current water depth without having to waste energy in swimming.

Explanation:

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