Which Is the Smallest Crustacean?
Water fleas make up a group of tiny animals. They mostly live in freshwater ponds and lakes, but a few species live in the ocean. Water fleas can be as tiny as 1⁄125 inch (0.2 millimeter) long. Larger species can grow to be as long as 3⁄4 inch (18 millimeters), which is still very small.
Water fleas have a see-through shell. If a water flea is big enough, you can look through its shell to see its heart pumping and its other organs working.
Water fleas are not really fleas, they are crustaceans. But they look as if they are hopping through the water, as fleas hop on land, and that is probably how they got their name.
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