Related by context. Frequent words. (Click for all words.) 66 invasive species 61 zebra mussels 60 invasives 60 aquatic invasive species 58 aquatic species 56 zebra mussel 55 Zebra mussels 54 Invasive species 53 organisms 53 quagga mussels 52 silver carp 51 invasive weeds 51 species 51 invasive weed 51 Asian Carp 51 nonnative species 51 waterways 50 Asian carp 49 aquatic organisms 49 lampreys 48 ecosystems 48 Japanese knotweed 48 aquatic ecosystems 48 freshwater lakes 48 toxic algae 47 algal blooms 47 phragmites 47 alga 47 gamefish 47 aquatic vegetation 47 coastal ecosystems 46 algae 46 mussels 46 ballast water 46 sea lamprey 46 purple loosestrife 46 shorelines 46 inland lakes 46 pests 46 microorganisms 45 milfoil 45 bacterial strains 45 eelgrass 45 ocean ecosystems 45 didymo 45 nutrient pollution 45 Great Lakes 45 estuaries 45 freshwater 45 mammals 45 marine organisms 45 microbes 44 pathogens 44 insect pests 44 water hyacinth 44 wetland habitat 44 Invasive Species 44 carp 44 alewives 44 algae blooms 44 waterbirds 44 pathogen 44 oceangoing vessels 43 migratory fish 43 habitats 43 pathogenic bacteria 43 noxious weeds 43 schistosomiasis 43 cormorants 43 coastal wetlands 43 molluscs 43 seaweeds 43 steelhead trout 43 organism 43 cane toads 43 algal bloom 43 overfishing 43 cyanobacteria 43 migratory species 42 inland waterways 42 micro organism 42 sea otters 42 critters 42 lakes 42 invertebrates 42 antibiotic resistant bacteria 42 gizzard shad 42 contaminants 42 microorganism 42 bacteria 42 feral animals 42 amphibian species 42 mollusks 42 overharvesting 42 inland waters 42 recreational boaters 42 oyster reefs 42 predators 42 cheatgrass 42 feral pigs 42 insects