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The body of rohu fish is covered by
Option: 1
Cycloid scale but tail is homocercal
Option: 2
placoid scale but tail is heterocercal
Option: 3
Cycloid scale but tail is heterocercal
Option: 4
Placoid scale but tail is homocercal
Answers (1)
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.
-
Osteichthyes have cycloid scale and their tail is homocercal while means it appears symmetrical from outside and the vertebral column passes into the upper lobe of the tail.
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