by Kaley Fech, Great Lakes Echo, Capital News Service

The red swamp crayfish can reproduce multiple times a year. Females can carry up to 900 eggs.

That means rapid population growth and possibly trouble for the Great Lakes.

The species is native to the Gulf Coast region of the United States and Mexico, but it has invaded Michigan inland waters and threatens the Great Lakes.

“This is a crayfish that when introduced outside of its native range has had big and well-documented negative effects on freshwater ecosystems,” said Eric Larson, an assistant professor in the Natural Resources and Environmental Sciences Department at the University of Illinois.

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