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| No. | SUBJECT | LOCATION | PHOTOGRAPHER/SOURCE | Date | IMAGE |
FILE SIZE (in bytes) Medium/Large |
|---|---|---|---|---|---|---|
| 226 | Zebra mussels washed up on beach | Lake Erie | Bay City Times (courtesy Great Lakes Environmental Research Lab) | Jun.05 |
 | 34081/289421 |
| 227 | Zebra mussel | Detroit River | Center for Great Lakes and Aquatic Sciences | Oct.93 |  | 18124/241839 |
| 228 | Zebra mussel | Detroit River | Center for Great Lakes and Aquatic Sciences | Mar.94 |  | 16999/222993 |
| 229 | Sea lamprey | Unknown | Great Lakes Sea Grant Network Exotic Species Graphics Library |  | 15184/151386 | |
| 230 | Lake trout with scar from sea lamprey | Unknown | Center for Great Lakes and Aquatic Sciences | Nov.73 |  | 23353/292269 |
| 231 | Sea lamprey on lake trout | Unknown | US Fish and Wildlife Service |  | 19174/226590 | |
| 232 | Eurasian ruffe | Unknown | Gary Cholwek, National Biological Service |  | 16680/194516 | |
| 233 | White perch | Lake Erie | Minnesota Sea Grant, Jeff Gunderson | Oct.93 |  | 19187/236784 |
| 234 | Alewife | Unknown | Center for Great Lakes and Aquatic Sciences, David Jude | Jul.75 |  | 15712/191145 |
| 235 | Spiny water flea | Unknown | US Fish and Wildlife Service |  | 14200/176826 | |
| 236 | Spiny water flea clogging gill net | Lake Superior Minnesota | Steve Geving, Minnesota Department of Natural Resources |
 | 20935/291682 | |
| 237 | Three-spine stickleback | Taconite Harbor, Minnesota | Minnesota Sea Grant, Jeff Gunderson | Jun.84 |  | 13297/221885 |
| 238 | Tubenose goby | Unknown | Center for Great Lakes and Aquatic Sciences | Jan.95 |  | 15832/233374 |
| 239 | Round goby | Unknown | Center for Great Lakes and Aquatic Sciences. | Jan.95 |  | 17333/250107 |
| 240 | Rusty crayfish | Lake Superior | Minnesota Sea Grant, Jeff Gunderson | Jun.05 |  | 18390/255216 |
| 241 | Purple loosestrife | Saginaw Bay Lake Huron | US Environmental Protection Agency, Karen Holland | Aug.94 |
 | 23735/287684 |
