The Operculum is a bony plate covering gills of _________.

a. bony fishes

b. tadpole

c. cartilaginous fishes

d. all fishes

The Correct option is A.

The operculum is a hard bony cover that protects the gills of bony fish. It helps keep the delicate gills safe and plays an important role in fish respiration by allowing water to flow smoothly over the gills, enabling the fish to breathe efficiently.

Explanation:

Bony Fish:

The operculum is a bony cover found on bony fish (Osteichthyes), which make up most fish species.

Protection:

The operculum protects the delicate fish gills from damage and injury.

Breathing and Respiration:

By opening and closing, the operculum helps water flow over the gills, allowing the fish to breathe by taking in oxygen and releasing carbon dioxide.

Fish without Operculum:

Some fish, like sharks and rays, do not have an operculum. Instead, they have multiple gill slits to help with breathing.