What is the function of a fish's swim bladder?

Question

1)to regulate body temperature
2)to obtain oxygen from the water
3)to control salt intake
4)to control buoyancy

Answer 1

The function of a fish's swim bladder is 4) to control buoyancy. The swim bladder allows fish to maintain their position in the water column without expending energy. By regulating the amount of gas in the swim bladder, fish can adjust their buoyancy to rise or sink as needed.