Question

In the fishes of which class, operculum is absent?

Answer 1

Answer:

Sharks, rays

Sharks, rays and relatives such as elasmobranch fishes lack the opercular series. They instead respire through a series of gill slits that perforate the body wall. Without the operculum bone, other methods of getting water to the gills are required, such as ram ventilation, as used by many sharks.

Answer 2

Answer:

Sharks, rays

Sharks, rays and relatives such as elasmobranch fishes lack the opercular series. They instead respire through a series of gill slits that perforate the body wall. Without the operculum bone, other methods of getting water to the gills are required, such as ram ventilation, as used by many sharks.