Amynthas agrestis, the Asian jumping worm, is a species of worm in the family Megascolecidae. It has a smooth, glossy, grey or brown body with a milky-white clitellum that is generally a collar-like band around their body and can range from 1.5 to 8 in (3.8 to 20.3 cm) in length. Amynthas agrestis is located about 14-16 segments away from their head with a thick lifted, pinky appearance.  Adult worms are able to reach the length of 10-13 centimeters.  If they are disturbed they move in a motion that mocks the movement of a snake, moving back and forth simultaneously. Eventually the A. agrestis is able to break off a piece of its tail segments in the attempt to escape. As a result, they have earned the nicknames of “crazy worm” and “snake worm”. Amynthas agrestis is native to Japan, Korea and Taiwan. They were introduced to North America due to increased human activity during the 19th century; it is considered to be an invasive species in the United States. Worms within the genus Amynthas (jumping worms) reproduce and develop quicker than their European counterparts. The names Crazy and Jumping worm originate from the worm thrashing around rapidly when threatened. They tend to serpentine in a snake-like motion which tends to appear energetic and vicious. It can also detach its tail to aid escape from possible predators

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