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Aquatic

why do most fish have scales
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Why Do Most Fish Have Scales?

Why Do Most Fish Have Scales? The skin of most fishes is covered with scales. Scales vary enormously in size, shape, structure, and extent,

where does a leech feed
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Where Does a Leech Feed?

Where Does a Leech Feed? Leeches, which are rather slimy worms and vary in length from an inch to several inches, have two suckers, a big on