Click on each of the images above to view enlarged photo of didymo
How to tell if you may be seeing Didymo
|Location||mostly clear flowing water with rocky bottom, may be attached to plants||deep silty areas with no rocks or plants, highly colored waters.|
|Color||tan, light brown or whitish||green or dark brown/black
clear or transparent
|Texture||clumps or ropy strands, rough cottony feel, fibrous||thin layers, slippery or gelatinous|
|Appearance||no leaves or roots (BUT may attach to leaves or stems). Sometimes mistaken for fiberglass, toilet paper or tissue.||has leaves or roots
looks like an aquatic plant
If your sample matches three of the "yes" descriptions above, you may have found Didymo. We’d like to know!
Please send a dime-sized sample in small container or folded in a business card to:
Samples from Vermont
Didymo identification, Water Quality Division
103 S. Main St., Bldg 10N, First Floor
Waterbury VT 05671-0408
(802) 241 – 3770 or 241 – 3777
Samples from New Hampshire
NHDES Limnology Center
29 Hazen Drive
Concord, NH 03301
(603) 271-2248 or (603) 271-3414
Be sure to include your name, address and phone or e-mail so that we may contact you.
Also, please provide a detailed description of where you found your sample: name of the river or stream, the town, and precise location (such as GPS coordinates, nearest road, or a clearly marked map).