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This is called the operculum
The operculum in a perch is a bony flap covering and protecting the gills located on each side of the fish's head. It is part of the fish's respiratory system, helping to regulate the flow of water over the gills for oxygen intake.
The operculum assists in protecting the gills of fish and regulating water flow for respiration. This evolutionary adaptation allows for better oxygen exchange and helps prevent debris or predators from entering 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.
It is a bone that lies at the base of the stapes and is joined to the shoulder girdle by a thin muscle known as the operscularis. It may form part of a special system that provides information to the frog on the degree of twisting between its head and trunk region. It is therefore likely to assist in balance control.
Sharks get around without an operculum due to the fact that they instead have branchial flaps. The branchial flaps allow the shark to lay on the sea floor and still "breath" without taking in sand.
Jawless fish are cartilaginous, but they do not have jaws. Class Chondrichthyes, which contains most cartilaginous fish, like sharks, have powerful jaws.
The operculum
This is called the operculum
The flap of tissue that covers a bony fish gill is the bony operculum.
The fin located behind the operculum on a perch fish is the Pectural Fins (paired).
Bony fish (Class: Osteichthyes) have: 1. a bony skeleton 2. a swim bladder 3. a gill flap or cover (the operculum)
The gills of a fish.
The operculum is part of the respiratory system in fish. It is a bony flap that covers and protects the gills, helping with the process of obtaining oxygen from water.
It opens and closes like its breathing.
the gill operculum covers and protects the gills.
Pectoral fins