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 Buoyancy in a bony fish is maintained with the help of 

Option: 1

. Streamlined body 


Option: 2

Paired fins 


Option: 3

Swim bladder 


Option: 4

All of these 


Answers (1)

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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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