![Adult quagga mussels are small, about the size of a person's thumbnail.](https://hagadone.media.clients.ellingtoncms.com/img/photos/2023/12/06/quagga_mussel_t1170.jpeg?5cc718665ab672dba93d511ab4c682bb370e5f86)
Adult quagga mussels are small, about the size of a person's thumbnail.
December 7, 2023
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![Effect of quagga mussel treatment on fish populations](
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December 7, 2023 1 a.m.
Effect of quagga mussel treatment on fish populations
Treatment caused high mortality in some species; others survived well
Biologists quickly learned that the treatment caused high mortality in certain species, while others survived quite well.