Spiny Water Flea (IMAGE)

University of Wisconsin-Madison

Spiny Water Flea

Caption

The invasive spiny water flea is a voracious predator of native zooplankton in Lake Mendota. Originally from Russian lakes, it made its way to the Great Lakes in the ballast water of cargo ships. Its long tail helps keep it safe from smaller fish.

Credit

Jake Walsh/UW-Madison

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