Class Osteichthyes


 
 
Concept Explanation
 

Class Osteichthyes

This class includes bony fish, or fish with a skeleton of bone. Their characteristics are :

  • These fish have ctenoid or cycloid scales which are different from those of cartilaginous fish.
  • Unlike cartilaginous fish, they have gills covered by an operculum.
  • Their fins are membranous, while those of cartilaginous fish are fleshy.
  • Many bony fish have an air-filled swim bladder to help them float. They have a two-chambered heart.
  • Some are marine, while some live in freshwater and in most fertilization is external.
  • Most of the fish we eat, like herring, trout, carp, perch and salmon, are bony fish. Sea horse (Hippocampus) and lung fish (Protopterus) are also bony fish.
  • Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    The fish shown in the figure is the member of 

                 

    Right Option : C
    View Explanation
    Explanation
    Question : 2

    The gills are covered by operculum  in __________________ class .

    Right Option : A
    View Explanation
    Explanation
    Question : 3

    Air filled swim bladders are present in _______________________ .

     

     

    Right Option : C
    View Explanation
    Explanation
     
     
    Related Videos
    Language - Hindi/English
    Language - Hindi/English
    Language - Hindi/English

    Language - Hindi/English
    Language - Hindi/English
    Language - Hindi/English

    Language - Hindi/English
    Language - Hindi/English
    Language - Hindi/English

    Language - Hindi/English
    Language - Hindi/English


    Students / Parents Reviews [20]