dnr researchers dive to bottom of lake superior near grand marais in search of rock snot
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DNR researchers dive to bottom of Lake Superior near Grand Marais in search of ‘rock snot’

Rock snot, officially called didymo, was the centerpiece of the underwater research the DNR recently conducted in Lake Superior. Rantala and several other DNR researchers, fisheries biologists and members of the state agency’s aquatic invasive species unit traveled to Grand Marais in late July to collect samples from the bottom of Lake Superior. Read the full story by WTIP – Grand Marais, MN.

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