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The flap of tissue that covers a bony fish gill is the bony operculum.
The gills of a fish.
The fin located behind the operculum on a perch fish is the Pectural Fins (paired).
Jawless fish are cartilaginous, but they do not have jaws. Class Chondrichthyes, which contains most cartilaginous fish, like sharks, have powerful jaws.
This is called the operculum
The operculum of a perch, or any bony fish, is located behind the jaw and face, just in front of the pectoral fin.
It opens and closes like its breathing.
the gill operculum covers and protects the gills.
operculum ( plural ; operculi ) is actually gill cover or lid of a cavity having gills . its major function is to protect gills as well as to move water over gills so that gill may be able to extract oxygen from water . as this lid play an important role in moving water over gills so fishes having operculum can survive even if they are stationary . on other hand fishes lacking operculi have to move continuously to survive .all bony fishes have operculi . best example of fish having no operculum is shark.
OPERCULUM
OPERCULUM
That is a hard but flexible cover which, in bony fish, forms the outer wall of the gill chamber. It protects the gills and also plays a major role in the pumping mechanism that regulates the continuous flow of water over them.