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Eurasian Watermilfoil

Eurasian water milfoil in a pond. The water in the pond is bright blue. The water milfoil is green and forms dense mats that float near the surface of the pond. The mats fill most of the water shown in the image.

Other names: Eurasian watermilfoil, spiked watermilfoil, Myriophyllum spicatum

Where did it come from?

Eurasian watermilfoil was introduced into the United States between 1880-1940 from its native range in Europe, Asia, and North Africa.

Why is it invasive?

Eurasian watermilfoil out competes native species but is not good food or habitat for native animals. It makes dense mats on the surface of the water that tangle boats and swimmers.

How do you prevent its spread?

Clean, drain, and dry water equipment like boats.


Aquatic invasive species: Eurasian watermilfoil 

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Image credit: Robert L. Johnson, Cornell University, Bugwood.org