What steps to take if you see a didymo?

If you see didymo, also known as "rock snot," in a waterway, it's important to take immediate action to prevent its spread. First, thoroughly clean and dry all your gear, including waders, boots, and fishing equipment, before leaving the area. Use hot water and scrub all surfaces, and if possible, disinfect with a solution of 2% bleach or a dedicated cleaning product. Finally, report the sighting to local environmental authorities to help with monitoring and management efforts.