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Invasive zebra mussels, USA
Zebra mussels (Dreissena polymorpha) found in Diamond Lake, Oregon, USA. Zebra mussels are an invasive species in the USA, meaning they are non-native and believed to cause damage to local ecosystems, economies or human health. These mussels attach to hard surfaces such as pipes, screens, rock, logs, boats, and ropes. They harm native fish species in the USA by reducing competing for plankton as a food source., by Bob Nichols, US DEPARTMENT OF AGRICULTURE/SCIENCE PHOTO LIBRARY
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