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Sea stars are not fish

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Sea stars are not true fish, even though they live underwater and are commonly referred to as "starfish." They lack gills, scales, and fins, as do fish. Sea stars move in a manner distinct from that of fish. While fish use their tails to propel themselves, sea stars use tiny tube feet to propel themselves. Scientists prefer to refer to starfish as "sea stars" because they are not classified as fish.

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