Correct option is A
→ Oreochromis niloticus (Nile tilapia) is a well-known maternal mouth brooder.
→ Eggs and larvae are incubated inside the mother’s mouth for protection.
→ Ensures high survival rates in early developmental stages.
Information Booster:
→ Mouthbrooding evolved as a strategy against predation.
→ Increases parental investment and offspring fitness.
→ Common in cichlids, especially African species.
Additional Information (Other Options):
(b) Copella arnoldi: Splashing tetra; lays eggs above water.
(c) Rutilus rutilus: Roach; not a mouth brooder.
(d) Oryzias latipes: Medaka; egg-carrying but not mouth brooding.