Related by context. Frequent words. (Click for all words.) 62 Asian carp 57 Asian Carp 51 Chicago Sanitary 49 silver carp 49 Great Lakes 48 Ship Canal 47 invasive species 45 carp 45 zebra mussels 42 ballast water 41 contaminated sediment 41 St. Lawrence Seaway 41 quagga mussels 40 waterways 40 ash borer 39 steelhead trout 39 waterway 39 zebra mussel 39 Des Plaines River 39 emerald ash borer 38 mussels 38 Lake Superior 38 lamprey 38 Chinook salmon 38 lake trout 37 mollusks 37 invasives 37 Lake Huron 37 Lake Erie 37 Emerald Ash Borer 37 northern pike 36 chronic wasting 36 Indiana Dunes 36 paddlefish 36 cane toads 36 Mississippi River 36 aquatic species 36 sediment 36 Michigan 35 bullfrogs 35 chinook salmon 35 milfoil 35 Lake Winnebago 35 Pere Marquette 35 yellow perch 35 bull trout 35 mercury pollution 35 steelhead 35 endangered salmon 35 sturgeon 35 lakes 35 delta smelt 35 smallmouth bass 34 toxic algae 34 ash trees 34 TRAVERSE CITY Mich. 34 Calumet 34 inland lakes 34 cane toad 34 gray wolves 34 walleye 34 salamanders 34 muskies 34 seaway 34 Burmese pythons 34 muskie 33 gray squirrels 33 didymo 33 bluegills 33 Athabasca River 33 cormorants 33 contaminants 33 Gov. Jennifer Granholm 33 Maumee River 33 otters 33 freshwater 33 prairie dogs 32 plankton 32 borer 32 migrating birds 32 critters 32 hatchery fish 32 lionfish 32 fish 32 whooping crane 32 weevils 32 CWD 32 estuaries 32 gill nets 32 bovine tuberculosis 32 organisms 32 Michigan Upper Peninsula 32 coho 32 Wal Mart FLW Walleye 32 Granholm 31 gypsy moths 31 crayfish 31 Chippewa Indians 31 brook trout 31 beavers 31 boreal forest