Aquatic Invasive Species

Aquatic invasive species (AIS) are non-native plants and animals that can cause harm to recreation, our economy, and our environment. Learn more about them here.

Identifying AIS

The Identification section of this page compiles several resources for learning to identify AIS.

Reporting New AIS

Reporting new AIS finds is an important step in controlling their spread. Learn how to report new AIS here.

Lakes & AIS Viewer

This interactive map published by WDNR displays populations of aquatic invasive species throughout the state.

Lists of AIS Populations

These pages list known populations of AIS in Wisconsin, organized by waterbody and species.

Stop Aquatic Hitchhikers

This page reviews how you can prevent the spread of invasive species, no matter how you use our waters.

Decontamination

This page provides guidance on how to decontaminate equipment to kill microscopic AIS.