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  • Solve! A jawless fish, which laws eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is :

A jawless fish, which laws eggs in fresh water and whose ammocoetes larvae after metamorphosis return to the ocean is :

  • Option 1)

    Myxine

  • Option 2)

    Neomyxine

  • Option 3)

    Petromyzon

  • Option 4)

    Eptatretus

 

Answers (1)

best_answer

 

 

Class Cyclostomata -

All are ectoparasites on some fishes. Mouth is circular and jawless. Head and brain poorly developed.

- wherein

 

Eg. Petromyzon, Myxine.

 

Petromyzon(the lamprey) belongs to the section Agnatha of the sub-phylum-Vertebrata. They have long, greenish brown, cylindrical body with smooth scaleless, slimy skin, jawless mouth, etc. They lay eggs in freshwater but their ammocoete larvae(lower) after metamorphosis return to the ocean.


Option 1)

Myxine

Incorrect

Option 2)

Neomyxine

Incorrect

Option 3)

Petromyzon

Correct

Option 4)

Eptatretus

Incorrect

Posted by

divya.saini

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