Question

The air bladder provides buoyancy in

• A. Torpedo
• B. Labeo
• C. Carcharodon
• D. Trygon

Answer 1

The correct option is B

Labeo

The correct option is B.

Explanation for the correct option:

Option B:

1. The air bladder also called a swim bladder, gas bladder or fish maw is an organ present in many bony fishes.
2. It helps to control their buoyancy, that is, maintain them at the depth they are found in, without having to expend their energy in swimming.
3. It usually contains gas (oxygen) or oils.
4. The air bladder is homologous to the lungs evolutionarily.
5. Sharks and rays, the cartilaginous fish do not possess air bladders at any point in their lifetime.

Explanation for the incorrect options:

Option A:

Air bladder is absent torpedo.

Option C:

The air bladder is absent Carcharodon.

Option D:

The air bladder is absent trygon.

Final answer: The air bladder provides buoyancy in Labeo.