In which of the following fishes does the male change sex after disappearance of the female?

Correct option is C

Correct Answer: (c) Clown fish
Explanation:
→ Clownfish are protandrous hermaphrodites: all individuals start as males.
→ When the dominant female dies, the dominant male transforms into a female.
Information Booster:
→ Live in symbiosis with sea anemones.
→ Social hierarchy determines sex change.
→ Important model species for studying sex differentiation.
Additional Information: Wrasses exhibit protogyny, not protandry.