From thousands of gold fish to exotic carp, the Great Lakes are becoming home to invasive and non-invasive species of fish. One commercial fisherman tells the "Detroit News" he recently reeled in a South American red tail catfish which can grow to five-feet in the Amazon River. The Michigan Department of Natural Resources has received reports of what it calls "unique species" in the state's waterways. The state has issued warnings for owners not to release pet fish back into the wild.
Source: Detroit Free Press