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Unknown Swimming Insects #874191

Asked June 22, 2024, 2:07 PM EDT

There are seemingly billions of these tiny swimming insects in Lake Vermillion and am very curious to know what they are. Any help? Thanks.

St. Louis County Minnesota

Expert Response

The photos lack the detail needed to be sure, but the swimmers might be water fleas, also known as daphnia. Compare here:

https://images.app.goo.gl/fCud5gfPxNAPeDCBA

Learn more here:

https://www.ncbi.nlm.nih.gov/books/NBK2042/

An Ask Extension Expert Replied June 24, 2024, 3:20 PM EDT

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Unknown Swimming Insects #874191

Expert Response

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