Class Osteichthyes - Characteristics Features -
- These fishes have a bony skeleton.
- They have a large mouth with movable jaws.
- Their body is covered with cycloid or ctenoid scales. These scales are impermeable to water.
- The gill slits are covered with an operculum.
- They have a closed circulatory system with two-chambered heart having one atrium and one ventricle.
- They possess air bladder or swim bladder that maintains the buoyancy.
- They have defined lateral line system of sense organs.
- They are cold - blooded.
- They are oviparous and perform external fertilization.
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Swim or air bladder maintains the buoyancy of the body.-
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