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African Rue

Invasive Species of the Month: December 2012

Didymo (Didymosphenia geminata)


This invasive algae forms thick mats that damage fish and insect habitat. It can be brown, grey, or white,
and its texture resembles wet toilet paper.

Also Known As:

Rock snot

Resources
New York Department of Environmental Conservation
Pennsylvania Sea Grant Fact Sheet (PDF)
Environmental Protection Agency Fact Sheet (PDF)
Environmental Protection Agency Field Guide for Identification (PDF)

Videos
Introduction to Didymo
Tip of the Month: Didymo

 

Past "Invasive Species of the Month" Profiles