Abi Cole/ Outdoor Life
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![The spiney water flea is invading the Upper Midwest.](https://www.popsci.com/wp-content/uploads/2021/02/10/F6PEFNNMURA7RNHTDX7J274IKY.png?w=705)
Animals
A spiky flea could ruin Midwestern ecosystems and kill native fish A spiky flea could ruin Midwestern ecosystems and kill native fish
By Abi Cole/ Outdoor Life
February 17, 2021