Photo | Taxonomic Group | Family | Scientific Name (click for species profile) | Common Name | Continent of Origin | Year First Collected | Category |
 | Crustaceans-Copepods | Diaptomidae | Skistodiaptomus pallidus | A calanoid copepod | North America | 1974 | Nonindigenous |
 | Crustaceans-Copepods | Temoridae | Eurytemora affinis | A calanoid copepod | North America | 1966 | Nonindigenous |
 | Algae | Stephanodiscaceae | Cyclotella atomus | A centric diatom | Unknown | 1993 | Nonindigenous |
 | Algae | Stephanodiscaceae | Cyclotella cryptica | A centric diatom | Unknown | 1983 | Nonindigenous |
 | Algae | Chaetocerotaceae | Chaetoceros muelleri | A centric diatom | Unknown | 1978 | Nonindigenous |
 | Algae | Skeletonemataceae | Skeletonema potamos | A centric diatom | Unknown | 1983 | Nonindigenous |
 | Algae | Stephanodiscaceae | Stephanodiscus subtilis | A centric diatom | Eurasia | 1983 | Nonindigenous |
 | Algae | Skeletonemaceae | Skeletonema subsalsum | A centric diatom | Eurasia | 1978 | Nonindigenous |
 | Crustaceans-Cladocerans | Bosminidae | Eubosmina maritima | A cladoceran | Eurasia | 1992 | Nonindigenous |
 | Algae | Hymenomonadaceae | Hymenomonas roseola | A coccolithophorid | Europe | 1975 | Nonindigenous |
 | Crustaceans-Copepods | Canthocamptidae | Heteropsyllus nr. nunni | A copepod | Unknown | 2007 | Nonindigenous |
 | Crustaceans-Copepods | Cyclopidae | Cyclops strenuus | A copepod | North America | 1975 | Nonindigenous |
 | Crustaceans-Amphipods | Gammaridae | Gammarus fasciatus | A freshwater amphipod | North America | 1874 | Nonindigenous |
 | Crustaceans-Copepods | Ameiridae | Nitokra hibernica | A harpacticoid copepod | Eurasia | 1998 | Nonindigenous |
 | Crustaceans-Copepods | Ergasilidae | Neoergasilus japonicus | A parasitic copepod | Asia | 1994 | Nonindigenous |
 | Algae | Fragilariaceae | Diatoma ehrenbergii | A pennate diatom | Unknown | 1983 | Nonindigenous |
 | Algae | Bangiaceae | Bangia atropurpurea | A red alga | Europe | 1976 | Nonindigenous |
 | Algae | Stylonemataceae | Chroodactylon ornatum | A red alga | North America | 1982 | Nonindigenous |
 | Protozoans | Psammonobiotidae | Psammonobiotus communis | A testate amoeba | Eurasia | 2002 | Nonindigenous |
 | Protozoans | Psammonobiotidae | Psammonobiotus dziwnowi | A testate amoeba | Eurasia | 2002 | Nonindigenous |
 | Annelids-Oligochaetes | Tubificidae | Branchiura sowerbyi | A tubificid worm | Asia | 2003 | Nonindigenous |
 | Annelids-Oligochaetes | Tubificidae | Potamothrix bedoti | A tubificid worm | Eurasia | 2002 | Nonindigenous |
 | Annelids-Oligochaetes | Tubificidae | Potamothrix moldaviensis | A tubificid worm | Eurasia | 1967 | Nonindigenous |
 | Annelids-Oligochaetes | Tubificidae | Potamothrix vejdovskyi | A tubificid worm | Eurasia | 1967 | Nonindigenous |
 | Fishes | Clupeidae | Alosa pseudoharengus | Alewife | North America | 1933 | Nonindigenous |
 | Fishes | Anguillidae | Anguilla rostrata | American Eel | North America | 1957 | Nonindigenous |
 | Annelids-Oligochaetes | Naididae | Ripistes parasita | An oligochaete | Eurasia | 1980 | Nonindigenous |
 | Fishes | Salmonidae | Salmo salar | Atlantic Salmon | North America | 1873 | Nonindigenous |
 | Bacteria | Corynebacteriaceae | Renibacterium (Corynebacterium) salmoninarum | Bacterial kidney disease (BKD), Dee disease | Europe | 1999 | Nonindigenous |
 | Crustaceans-Cladocerans | Bosminidae | Eubosmina coregoni | Baltic Long-nosed Waterflea | Europe | 1967 | Nonindigenous |
 | Mollusks-Gastropods | Viviparidae | Callinina georgiana | Banded mysterysnail | North America | 1980 | Nonindigenous |
 | Plants | Poaceae | Echinochloa crus-galli | Barnyardgrass | Eurasia | 1896 | Nonindigenous |
 | Mollusks-Bivalves | Cyrenidae | Corbicula fluminea | Basket clam | Asia | 1993 | Nonindigenous |
 | Plants | Solanaceae | Solanum dulcamara | Bitter nightshade | Eurasia | 1975 | Nonindigenous |
 | Fishes | Catostomidae | Ictiobus niger | Black Buffalo | North America | 1986 | Nonindigenous |
 | Crustaceans-Mysids | Mysidae | Hemimysis anomala | Bloody red shrimp | Eurasia | 2008 | Nonindigenous |
 | Plants | Polygonaceae | Rumex obtusifolius | Bluntleaf dock | Eurasia | 1891 | Nonindigenous |
 | Plants | Hydrocharitaceae | Najas minor | Brittle waternymph | Eurasia | 2013 | Nonindigenous |
 | Fishes | Salmonidae | Salmo trutta | Brown Trout | Europe | 1970 | Nonindigenous |
 | Plants | Cabombaceae | Cabomba caroliniana | Carolina fanwort | North America | 1996 | Nonindigenous |
 | Fishes | Esocidae | Esox niger | Chain Pickerel | North America | 2015 | Nonindigenous |
 | Mollusks-Gastropods | Viviparidae | Cipangopaludina chinensis | Chinese mysterysnail | Asia | 1938 | Nonindigenous |
 | Fishes | Salmonidae | Oncorhynchus tshawytscha | Chinook Salmon | North America | 1870 | Nonindigenous |
 | Fishes | Salmonidae | Oncorhynchus kisutch | Coho Salmon | North America | 1985 | Nonindigenous |
 | Fishes | Cyprinidae | Cyprinus carpio | Common Carp | Eurasia | 1880 | Nonindigenous |
 | Plants | Poaceae | Phragmites australis australis | Common reed | Europe | 2010 | Nonindigenous |
 | Plants | Salicaceae | Salix fragilis | Crack willow | Eurasia | 2008 | Nonindigenous |
 | Plants | Primulaceae | Lysimachia nummularia | Creeping jenny | Eurasia | 2008 | Nonindigenous |
 | Plants | Potamogetonaceae | Potamogeton crispus | Curly-leaf pondweed | Eurasia | 1975 | Nonindigenous |
 | Algae | Gomphonemataceae | Didymosphenia geminata | Didymo | Unknown | 2015 | Nonindigenous |
 | Plants | Haloragaceae | Myriophyllum spicatum | Eurasian watermilfoil | Eurasia | 1982 | Nonindigenous |
 | Plants | Lamiaceae | Lycopus europaeus | European bugleweed | Eurasia | 1990 | Nonindigenous |
 | Mollusks-Gastropods | Lymnaeidae | Radix auricularia | European ear snail | Europe | 1974 | Nonindigenous |
 | Mollusks-Bivalves | Pisidiidae | Sphaerium corneum | European fingernail clam | Eurasia | 1980 | Nonindigenous |
 | Plants | Hydrocharitaceae | Hydrocharis morsus-ranae | European frogbit | Europe | 2010 | Nonindigenous |
 | Plants | Plantaginaceae | Veronica beccabunga | European speedwell | Europe | 1935 | Nonindigenous |
 | Crustaceans-Cladocerans | Cercopagidae | Cercopagis pengoi | Fishhook waterflea | Asia | 2002 | Nonindigenous |
 | Fishes | Ictaluridae | Pylodictis olivaris | Flathead Catfish | North America | 1991 | Nonindigenous |
 | Plants | Butomaceae | Butomus umbellatus | Flowering rush | Eurasia | 1938 | Nonindigenous |
 | Plants | Boraginaceae | Myosotis scorpioides | Forget-me-not | Eurasia | 2008 | Nonindigenous |
 | Coelenterates-Hydrozoans | Olindiidae | Craspedacusta sowerbii | Freshwater jellyfish | Asia | 1951 | Nonindigenous |
 | Fishes | Gobiidae | Proterorhinus semilunaris | Freshwater Tubenose Goby | Eurasia | 2000 | Nonindigenous |
 | Bacteria | Pseudomonadaceae | Aeromonas salmonicida | Furunculosis, ulcer disease, erythrodermatitis | Unknown | 2005 | Nonindigenous |
 | Fishes | Cyprinidae | Notropis buchanani | Ghost Shiner | North America | 2000 | Nonindigenous |
 | Fishes | Clupeidae | Dorosoma cepedianum | Gizzard Shad | North America | 1933 | Nonindigenous |
 | Plants | Rhamnaceae | Rhamnus frangula | Glossy buckthorn | Eurasia | 1942 | Nonindigenous |
 | Plants | Salicaceae | Salix caprea | Goat willow | Eurasia | 1973 | Nonindigenous |
 | Plants | Salicaceae | Salix alba | Golden willow | Eurasia | 1951 | Nonindigenous |
 | Fishes | Cyprinidae | Carassius auratus | Goldfish | Asia | 1880 | Nonindigenous |
 | Fishes | Cyprinidae | Ctenopharyngodon idella | Grass Carp (diploid) | Asia | 2020 | Nonindigenous |
 | Mollusks-Bivalves | Sphaeriidae | Pisidium amnicum | Greater European peaclam | Eurasia | 1899 | Nonindigenous |
 | Plants | Onagraceae | Epilobium hirsutum | Hairy willow herb | Eurasia | 1950 | Nonindigenous |
 | Mollusks-Bivalves | Sphaeriidae | Pisidium henslowanum | Henslow peaclam | Eurasia | 2015 | Nonindigenous |
 | Crustaceans-Copepods | Argulidae | Argulus japonicus | Japanese fishlouse | Asia | 2002 | Nonindigenous |
 | Viruses | Iridoviridae | Ranavirus | Largemouth bass virus (LMBV) | Unknown | 2003 | Nonindigenous |
 | Plants | Fabaceae | Lupinus polyphyllus | Marsh lupine | North America | 1992 | Nonindigenous |
 | Plants | Asteraceae | Cirsium palustre | Marsh thistle | Eurasia | 1960 | Nonindigenous |
 | Mollusks-Gastropods | Bithyniidae | Bithynia tentaculata | Mud bithynia | Europe | 1918 | Nonindigenous |
 | Bacteria | | Piscirickettsia cf. salmonis | Muskie pox | Unknown | 2005 | Nonindigenous |
 | Plants | Typhaceae | Typha angustifolia | Narrow-leaved cattail | Eurasia | 1952 | Nonindigenous |
 | Mollusks-Gastropods | Hydrobiidae | Potamopyrgus antipodarum | New Zealand mudsnail | Eurasia | 2016 | Nonindigenous |
 | Plants | Typhaceae | Sparganium glomeratum | Northern bur-reed | North America | 2012 | Nonindigenous |
 | Plants | Amaranthaceae | Chenopodium glaucum | Oakleaf goosefoot | Eurasia | 1893 | Nonindigenous |
 | Plants | Balsaminaceae | Impatiens glandulifera | Ornamental jewelweed | Asia | 1956 | Nonindigenous |
 | Fishes | Salmonidae | Oncorhynchus gorbuscha | Pink Salmon | North America | 1969 | Nonindigenous |
 | Plants | Apiaceae | Conium maculatum | Poison-hemlock | Eurasia | 1882 | Nonindigenous |
 | Fishes | Cobitidae | Misgurnus anguillicaudatus | Pond Loach | Asia | 1939 | Nonindigenous |
 | Plants | Lythraceae | Lythrum salicaria | Purple loosestrife | Eurasia | 1893 | Nonindigenous |
 | Plants | Salicaceae | Salix purpurea | Purple osier | Eurasia | 1980 | Nonindigenous |
 | Mollusks-Bivalves | Dreissenidae | Dreissena bugensis | Quagga mussel | Eurasia | 1997 | Nonindigenous |
 | Fishes | Osmeridae | Osmerus mordax | Rainbow Smelt | North America | 1906 | Nonindigenous |
 | Fishes | Salmonidae | Oncorhynchus mykiss | Rainbow Trout | North America | 1876 | Nonindigenous |
 | Crustaceans-Crayfish | Cambaridae | Procambarus clarkii | Red Swamp Crayfish | North America | 2022 | Nonindigenous |
 | Plants | Poaceae | Agrostis gigantea | Redtop | Eurasia | 1850 | Nonindigenous |
 | Plants | Poaceae | Phalaris arundinacea | Reed canarygrass | North America | 1933 | Nonindigenous |
 | Plants | Poaceae | Glyceria maxima | Reed mannagrass | Eurasia | 1972 | Nonindigenous |
 | Plants | Lamiaceae | Lycopus asper | Rough bugleweed | North America | 1954 | Nonindigenous |
 | Fishes | Gobiidae | Neogobius melanostomus | Round Goby | Eurasia | 1994 | Nonindigenous |
 | Plants | Juncaceae | Juncus compressus | Roundfruit rush | Eurasia | 1981 | Nonindigenous |
 | Fishes | Percidae | Gymnocephalus cernua | Ruffe | Eurasia | 1995 | Nonindigenous |
 | Crustaceans-Crayfish | Cambaridae | Faxonius rusticus | Rusty Crayfish | North America | 1968 | Nonindigenous |
 | Protozoans | Myxosomatidae | Myxobolus cerebralis | Salmonid whirling disease | Europe | 1970 | Nonindigenous |
 | Plants | Juncaceae | Juncus gerardii | Saltmeadow rush | North America | 1989 | Nonindigenous |
 | Crustaceans-Amphipods | Gammaridae | Echinogammarus ischnus | Scud | Europe | 1996 | Nonindigenous |
 | Fishes | Petromyzontidae | Petromyzon marinus | Sea Lamprey | North America | 1937 | Nonindigenous |
 | Plants | Asteraceae | Solidago sempervirens | Seaside goldenrod | North America | 2006 | Nonindigenous |
 | Fishes | Salmonidae | Oncorhynchus nerka | Sockeye Salmon | North America | 1973 | Nonindigenous |
 | Plants | Lamiaceae | Mentha spicata | Spearmint | Eurasia | 1889 | Nonindigenous |
 | Crustaceans-Cladocerans | Cercopagidae | Bythotrephes longimanus | Spiny waterflea | Europe | 1984 | Nonindigenous |
 | Plants | Polygonaceae | Persicaria maculosa | Spotted ladysthumb | Eurasia | 1909 | Nonindigenous |
 | Algae | Characeae | Nitellopsis obtusa | Starry stonewort | Eurasia | 1998 | Nonindigenous |
 | Fishes | Gasterosteidae | Gasterosteus aculeatus | Threespine Stickleback | North America | 1980 | Nonindigenous |
 | Crustaceans-Amphipods | Gammaridae | Gammarus tigrinus | Tiger scud | North America | 2002 | Nonindigenous |
 | Plants | Cyperaceae | Carex disticha | Tworank sedge | Eurasia | 1972 | Nonindigenous |
 | Viruses | Novirhabdoviridae | Novirhabdovirus sp. genotype IV sublineage b | Viral Hemorrhagic Septicemia Virus (VHSV-IVb) | North America | 2005 | Nonindigenous |
 | Plants | Poaceae | Alopecurus geniculatus | Water foxtail | Eurasia | 1988 | Nonindigenous |
 | Plants | Lamiaceae | Mentha aquatica | Water mint | Eurasia | 1913 | Nonindigenous |
 | Plants | Hydrocharitaceae | Stratiotes aloides | Water soldiers | Eurasia | 2016 | Nonindigenous |
 | Plants | Brassicaceae | Nasturtium officinale | Water-cress | Eurasia | 1875 | Nonindigenous |
 | Plants | Poaceae | Puccinellia distans | Weeping alkaligrass | Eurasia | 1901 | Nonindigenous |
 | Fishes | Moronidae | Morone americana | White Perch | North America | 1977 | Nonindigenous |
 | Plants | Menyanthaceae | Nymphoides peltata | Yellow floating-heart | Eurasia | 2019 | Nonindigenous |
 | Plants | Iridaceae | Iris pseudacorus | Yellow iris | Europe and Africa | 1953 | Nonindigenous |
 | Mollusks-Bivalves | Dreissenidae | Dreissena polymorpha | Zebra mussel | Eurasia | 1990 | Nonindigenous |