Related by context. Frequent words. (Click for all words.) 59 Asian carp 52 Asian Carp 50 invasive species 49 waterways 47 carp 47 silver carp 47 Great Lakes 46 zebra mussels 44 zebra mussel 44 Chicago Sanitary 43 Ship Canal 43 quagga mussels 42 inland lakes 41 ash borer 41 emerald ash borer 41 waterway 40 gypsy moths 40 invaders 40 steelhead trout 39 aquatic species 39 pests 38 lamprey 38 shorelines 38 mussels 37 northern pike 37 ash trees 37 sewage overflows 37 tributaries 37 insect pests 36 critters 36 invasive weeds 36 lakes 36 muskies 36 milfoil 36 navigable waters 36 invading 36 contaminated sediment 36 steelhead 36 shoreline 36 Invasive 35 feral hogs 35 lake trout 35 toxic algae 35 contaminants 35 bluegills 35 hatchery fish 35 endangered salmon 35 invader 35 hydrilla 35 coyotes 35 weevils 35 smallmouth bass 35 stink bugs 35 Des Plaines River 35 borer 35 ballast water 34 wetlands 34 beetle 34 pollutants 34 bacteria 34 Lake Erie 34 didymo 34 rivers 34 delta smelt 34 coastal wetlands 34 invasive 34 terrorists 34 gypsy moth 33 yellow perch 33 levee 33 rodents 33 pathogens 33 marshes 33 nutria 33 Mississippi River 33 noxious weeds 33 bull trout 33 Bald eagles 33 cormorants 33 canals 33 beetles 33 weeds 33 coho 33 Indiana Dunes 33 beavers 33 weevil 33 trout streams 33 nonnative 33 watersheds 33 walleye 32 estuaries 32 otters 32 St. Lawrence Seaway 32 Chinook salmon 32 sandbars 32 shipping lanes 32 boaters 32 marshlands 32 panfish 32 mosquitos 32 seaway