Q:
      
      
         
            
Which one of the following is a true fish as per the biological system of classification?
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: D) Flying fish         
         
Explanation: Cuttlefish or cuttles are marine animals of the order Sepiida. They belong to the class Cephalopoda, which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone. Despite their name, cuttlefish are not fish but molluscs.
Jellyfish are soft bodied, free-swimming aquatic animals with a gelatinous umbrella-shaped bell and trailing tentacles.
 
       
      
      
      
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