What animal has an operculum?
An operculum (fish), a flap that covers the gills in bony fishes and chimaeras. The cover that rapidly opens a cnida of a cnidarian such as a jellyfish or a sea anemone. What does an operculum do? The operculum is a hard, plate-like, bony flap that covers the gills of a bony fish (superclass: Osteichthyes)….