Question

Why do fish have air bladders within
the body?​

Answer 1

Answer:

Swim bladder, also called air bladder, buoyancy organ possessed by most bony fish. ... It contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking. It also serves as a resonating chamber to produce or receive sound.

Answer 2

Answer:

Swim bladder, also called air bladder, buoyancy organ possessed by most bony fish. ... It contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking. It also serves as a resonating chamber to produce or receive sound.

Explanation:

i think it may help you