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An earthworm

An earthworm is an invertebrate animal with a long, stretchy body and no legs. It is a type of annelid.

There are 5,500 known species of earthworms in 21 families. They are found everywhere, except in polar or dry climates. Their sizes vary: they can be between two centimeters and about three meters in length. The biggest known earthworm is the giant Gippsland earthworm, found in Australia. It is usually about 80 cm in length, but can grow to about 3 meters.