You will need Acrobat Reader to download PDFs. Take action against zebra mussels. Protect your boat and help slow the spread of zebra mussels.
Round gobies invade North America.
This small fish competes with native fish for food and habitat. A serious threat to North American fisheries. Another unwelcome newcomer to the Great Lakes. Commonly-asked questions about this tiny, exotic crustacean are addressed. The invasion and its implications.