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Click on each of the images above to view enlarged photo of didymo
How to tell if you may be seeing Didymo
| YES | NO | |
|---|---|---|
| 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 – 3777Samples 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).