Correct option is D
→ Live-bearer fishes give birth to fully formed young instead of laying eggs.
→ Most live-bearer aquarium species such as Guppy, Molly, Platy, and Swordtail belong to the family Poecilidae.
→ Fertilization is internal in these fishes, and embryos develop inside the female’s body.
Information Booster:
→ Live bearers exhibit high reproductive rates and are widely used in ornamental fish culture.
→ They show sexual dimorphism; males have a gonopodium for internal fertilization.
→ Their young have high survival rates due to advanced development at birth.
Additional Information (Other Options):
Option (a) Osteoglossidae: Includes Arowanas; not live bearers.
Option (b) Cyprinidae: Largest freshwater fish family (carps, minnows); egg layers.
Option (c) Cichlidae: Includes Tilapia and ornamental cichlids; mostly egg layers with parental care.