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Spiny water fleas are aquatic arthropods called zooplankton. Zooplankton are small shrimp-like creatures, and most of them survive by eating phytoplankton, the microscopic photosynthetic algae at the bottom of the food chain in lakes.
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Vilas County’s Trout Lake has a new invasive species. Spiny water fleas were found earlier this week by a fisherman who noticed them attached to his gear.…