Eurasian watermilfoil

Aquatic Invasive Species
Myriophyllum spicatum

  • Eurasian watermilfoil is a submerged aquatic plant that can form thick mats in shallow areas of lakes and rivers.
  • Mats of watermilfoil can displace native aquatic plants, interfere with swimming, and entangle boat propellers. Once established, the plant is nearly impossible to eradicate.
  • Discovered in North America in the 1940s, Eurasian watermilfoil has invaded nearly every U.S. state and at least three Canadian provinces. Watermilfoil spreads by floating on water currents or clinging to boats, motors, trailers and fishing gear.
  • See: Fact Sheet (PDF)
  • See: Michigan Lakes infested with Eurasian Watermilfoil (PDF)