| In 2002, the U. S. Fish and Wildlife Service found the non-native fish species, the ruffe, in Lake Michigan for the first time. |
| The female is called a Reeve without any ruffe about the neck, lesser then the other and hardly to bee got. |
| The ruffe is a small, spiny, European member of the perch family that does not grow much bigger than 12 cm. |
| In Lake Superior, ruffe are also found along the North Shore to Two Harbors, at Taconite Harbor and in Thunder Bay, Ontario. |
| They include the sea lamprey, zebra mussel, purple loosestrife, ruffe, round goby, spiny water flea and dozens of other species. |
| The round goby and ruffe threaten the Lakes' native perch, small-mouth bass and emerald shiner populations. |
