The terrestrial whirlpool worm, commonly known as the "earthworm", is scientifically known as the maturing leech (Bipalium)

The maturing leech whirlpool worm is a relatively low-grade terrestrial flatworm of the order Verticillasterida, family Verticillidae. It is commonly known as the earthworm and land vortex worm. It has a fan-shaped head and a flat, non-segmented body that is symmetrical from side to side. General body length of 20 to 30 centimeters, long up to 60 centimeters or more. Feeding on small animals and organic matter in the soil, there is a nickname called earthworm killer. It breathes with its skin and moves slowly by the fine cilia on its body. The maturing leech whirligig is a hermaphrodite

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