Which of the following statement is wrong about fanning?
a) Fanning delivers oxygenated water to the eggs
b) Fanning prevents build-up of sediment
c) Fanning does not remove metabolic waste

Correct option is B

Correct Answer: (b) Only c
Explanation:
→ Fanning does remove metabolic waste by generating water flow over eggs, so statement (c) is wrong.
→ Statements (a) and (b) are correct—fanning aerates eggs and prevents sediment accumulation.
Information Booster:
→ Essential in nest-building fishes like cichlids and sticklebacks.