In which of the following fishes are cotylephores found for attachment of eggs?

Correct option is A

Correct Answer: (a) Platystacus sp.
Explanation:
→ Cotylephores are specialized cup-shaped structures present on the ventral surface of female Platystacus (Banjo catfish).
→ These structures hold and protect the fertilized eggs during incubation.
→ This unique parental care mechanism increases egg survival in muddy habitats.
Information Booster:
→ Cotylephores allow eggs to remain attached even in strong currents.
→ They promote oxygenation and prevent sediment accumulation over eggs.
→ Observed mainly in South American catfishes.
Additional Information (Other Options):
(b) Pterobunocephalus: Lacks cotylephores.
(c) Antennarius: Frogfish, exhibits egg-binding but not cotylephores.
(d) Apogon: Cardinal fish, mostly mouth brooders.