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What do you know about fish?

Fish are vertebrates, which are adapted to life in the aquatic environment. Fish are the most numerous group of vertebrates. The number of different species of fish is almost as much as all other vertebrates together.

 
  Author: bole | 29th November 2013 |  
 
 
 
 

How many fish species do we know?

 


   
 

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Depending on the composition of the backbone of fish, there are two main groups: cartilaginous and...?

 


   
 

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World's largest fish is?

 


   
 
 
   
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