Q.

Which one of the following is not a true fish?

A. Shark
B. Starfish
C. Eel
D. Sea-horse
Answer» B. Starfish
Explanation: Although sea stars (star fish) live underwater and are commonly called "starfish," they are not fish. They do not have gills, scales, or fins like fish do and they move quite differently from fish. While fish propel themselves with their tails, sea stars have tiny tube feet to help them move along.
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