Q. Following are few examples of bony fishes. Choose the odd one out as marine bony fish.

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Solution:

Out of the given examples of bony fishes, Hippocampus (sea horse) and Exocoetus (flying fish) are marine fishes, i.e. these are found in sea water.
Clarias, Catla and Labeo are freshwater fishes, i.e. these are found in rivers, lakes, etc.