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 |
|---|---|---|---|
| Idaho giant salamander (Dicamptodon aterrimus) | Amphibians | Dicamptodontidae | Prohibited |
| California Giant salamander (Dicamptodon ensatus (Not: D. tenebrosus; D. copei)) | Amphibians | Dicamptodontidae | Prohibited |
| Colonial sea squirt (Didemnum vexillum) | Tunicate/Sea-squirt | Didemnidae | Unlisted |
| Quagga mussel (Dreissena bugensis) | Molluscs | Dreissenidae | Prohibited |
| Zebra mussel (Dreissena polymorpha) | Molluscs | Dreissenidae | Prohibited |
| Anderson's Salamander (Echinotriton andersoni) | Amphibians | Salamandridae | Prohibited |
| European Pond Turtle (Emys orbicularis) | Reptiles | Emydidae | Prohibited |
| Chinese mitten crab (Eriocheir sinensis) | Crustaceans | Grapsidae | Prohibited |
| Northern pike (Esox lucius) | Fish | Escocidae | Prohibited |
| Murray crayfish (Euastacus armatus) | Crustaceans | Parastacidae | Prohibited |
| Glenelg crayfish (Euastacus bispinosis) | Crustaceans | Parastacidae | Prohibited |
| Gippsland crayfish (Euastacus kershawi) | Crustaceans | Parastacidae | Prohibited |
| Spiny crayfish (Euastacus setosus) | Crustaceans | Parastacidae | Prohibited |
| Spiny crayfish (Euastacus spinifer) | Crustaceans | Parastacidae | Prohibited |
| Lamington Spiny crayfish (Euastacus sulcatus) | Crustaceans | Parastacidae | Prohibited |
| Spiny crayfish (Euastacus valentulus) | Crustaceans | Parastacidae | Prohibited |
| Spiny crayfish (Euastacus woriwuru) | Crustaceans | Parastacidae | Prohibited |
| Yarra crayfish (Euastacus yarraensis) | Crustaceans | Parastacidae | Prohibited |
| Pyrenean Brook salamander (Euproctus asper) | Amphibians | Salamandridae | Prohibited |
| Mosquito fish (Gambusia affinis) | Fish | Poecilidae | Regulated |
| Gammarella berringar (Gammarella berringar) | Crustaceans | Melitidae | Regulated |
| Land Yabby (Geocharax falcata) | Crustaceans | Parastacidae | Prohibited |
| Imienpo Station Frog (Glandirana emeljanovi) | Amphibians | Ranidae | Prohibited |
| Assam Tree frog (Hyla annectans) | Amphibians | Hylidae | Prohibited |
| Common Tree frog (Hyla arborea) | Amphibians | Hylidae | Prohibited |