John Mullican, Fisheries Biologist
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Posted on May 11, 2012 | Permalink
Rock Snot (Didymo) in Hunting Creek
Location: Hunting Creek
The invasive algae Didymosphenia geminate, didymo for short and more appropriately called “rock snot”, was recently confirmed in the popular Hunting Creek fly-fishing-only, catch-and-return area.
Didymo forms thick unattractive mats on the stream bottom that can negatively impact the insects that trout eat and make fishing difficult. It is most commonly spread by hitching a ride on fishermen’s waders/boots. Since “rock snot” is a recent invader, it is not known how damaging it will become in its new environment.
Fishermen can help prevent the spread of invasive species like didymo by disinfecting waders and boots before fishing other waters. The best way to do this is to thoroughly clean, rinse, and allow boots to dry in the sun for several days. A salt solution using 1 cup of salt per gallon of water can be used to disinfect gear if thorough drying is not possible between trips. Wader wash stations are available on Hunting Creek as well as many other streams where a salt solution is available. More information on didymo can be found by clicking here.