Information About Didymosphenia geminata (didymo)

The invasive alga, Didymosphenia geminata, commonly referred to as "didymo", is a freshwater microscopic diatom. It is found in streams and rivers across much of North America. Didymo attaches to the streambed by a stalk and it forms thick mats that can alter aquatic ecosystems. These mats have a rough texture similar to wet wool and can look like strands of toilet paper.

Prevent the spread of didymo

Cleaning equipment between uses on different freshwater systems is important to prevent the spread of didymo and other invasive species. If you can follow the simple Inspect, Clean and Dry steps, then you will do a world of good. For decontamination methods specific to didymo, you can learn more from the links below in the report "Decontaminating Equipment". For more information on general cleaning practices, click here