Aquatic invasive species (AIS) pose an ongoing threat to Washington's environment and economy. Find out which species are considered invasive in Washington.
| Species | Category | Family | AIS classification |
|---|---|---|---|
| Red-Bellied piranha (Pygocentrus nattereri) | Fish | Characidae | Prohibited |
| Red piranha (Rooseveltiella nattereri) | Fish | Characidae | Prohibited |
| Black piranha (Serrasalmus rhombeus) | Fish | Characidae | Prohibited |
| Walking catfish (Clarias batrachus) | Fish | Clariidae | Prohibited |
| Blackskin catfish (Clarias meladerma) | Fish | Clariidae | Prohibited |
| Fathead minnow (Pimephales promelas) | Fish | Cyprinidae | Prohibited |
| Bighead carp (Hypophthalmichthys nobilis) | Fish | Cyprinidae | Prohibited |
| Black carp (Mylopharyngodon piceus) | Fish | Cyprinidae | Prohibited |
| Grass carp (Ctenopharyngodon idella) | Fish | Cyprinidae | Prohibited |
| Silver carp (Hypophthalmichthys molitrix) | Fish | Cyprinidae | Prohibited |
| Golden Orfe (Leuciscus idus - Golden) | Fish | Cyprinidae | Prohibited |
| Silver Orfe (Leuciscus idus - Silver) | Fish | Cyprinidae | Prohibited |
| Rudd (Scardinius erythropthalmus) | Fish | Cyprinidae | Prohibited |
| Round goby (Neogobius melanostomus) | Fish | Gobiidae | Prohibited |
| Northern pike (Esox lucius) | Fish | Escocidae | Prohibited |
| Longnose Gar (Lepisosteus osseus) | Fish | Lepisosteidae | Prohibited |
| Alligator Gar (Atractosteus spatula) | Fish | Lepisosteidae | Prohibited |
| Nutria (Myocastor coypus) | Mammals | Myocastoridae | Prohibited |
| Zebra mussel (Dreissena polymorpha) | Molluscs | Dreissenidae | Prohibited |
| Quagga mussel (Dreissena bugensis) | Molluscs | Dreissenidae | Prohibited |
| New Zealand mud snail (Potamopyrgus antipodarum.) | Molluscs | Gastropoda | Prohibited |
| Assam Tree frog (Hyla annectans) | Amphibians | Hylidae | Prohibited |
| Common Tree frog (Hyla arborea) | Amphibians | Hylidae | Prohibited |
| Chinese Tree frog (Hyla chinensis) | Amphibians | Hylidae | Prohibited |
| Hallowell's Tree frog (Hyla hallowellii) | Amphibians | Hylidae | Prohibited |