WDAY.com |

North Dakota's #1 news website 10,650,498 page views — March 2014

Published May 09, 2012, 12:00 AM

Zebra mussels

Zebra mussels filter so much plankton they can disrupt the aquatic food chain, and their sharp shells can be hazardous to swimmers. Forum file photo
Read the article: Minnesota to crack down on spread of invasive species this summer