Related by context. Frequent words. (Click for all words.) 63 Zebra mussels 61 salvinia 61 Eurasian milfoil 60 invasive mussels 60 Algae blooms 59 aquatic weeds 59 Hydrilla 59 Quagga mussels 58 Emerald ash borer 58 Gypsy moths 58 Invasive plants 57 Invasive species 57 invasive species 57 round gobies 57 zebra mussels 57 Didymo 56 sea lampreys 56 viral hemorrhagic septicemia 56 Eurasian watermilfoil 56 giant salvinia 55 salties 55 varroa mites 55 Milfoil 55 toxic algae 55 snakehead fish 55 invasive insect 55 aquatic weed 55 native brook trout 55 Infestations 54 invasive weed 54 mussels 54 weevils 54 invasives 54 Phragmites 54 purple loosestrife 54 mealybugs 54 invasive weeds 54 hogweed 54 northern snakehead 53 didymo 53 nonnative fish 53 aquatic vegetation 53 Sea otters 53 red legged frogs 53 invasive pest 53 adelgids 53 toxic algae blooms 53 whirling disease 52 creeks rivers 52 mussel species 52 emerald ash borers 52 zebra mussel 52 tributary streams 52 hemlock woolly adelgid 52 forested wetlands 52 Larvae 52 Feral hogs 52 gobies 52 migrating waterfowl 52 hydrilla 51 feral pigs 51 freshwater ponds 51 adelgid 51 Migrating birds 51 spotted knapweed 51 rotting vegetation 51 infestation 51 fireweed 51 Rotenone 51 Rainbow trout 51 Lionfish 51 aquatic invasive species 51 Medfly 51 freshwater mussels 51 aquatic nuisance 51 bagworms 51 cohos 50 stinkbugs 50 Coho salmon 50 lakes 50 Scotch broom 50 geoducks 50 leafy spurge 50 Aphids 50 Controlled burns 50 Invasive 50 invasive aquatic 50 bullfrogs 50 pests 50 biota 50 eel grass 50 snails 50 copperheads 50 coli 50 Giant squid 50 Midges 50 knotweed 50 mealybug 49 loosestrife 49 rock snot 49 stoneflies