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The flap of tissue that covers a bony fish gill is the bony operculum.
Lizards are not bony or cartilaginous fish, they are reptiles.
bony
cartilaginous
There are bony fishes and cartilaginous fishes.
This is called the operculum
it is the cartilaginous fish.s
Similar to Stingrays, skates are cartilaginous.
The operculum of a perch, or any bony fish, is located behind the jaw and face, just in front of the pectoral fin.
operculum
Sharks are not bony fish. They are cartilaginous fish.
They belong to the bony fish category. See the related link.