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 |
|---|---|---|---|
| Florida Softshell turtle (Apalone ferox) | Reptiles | Trionychidae | Prohibited |
| Smooth Softshell turtle (Apalone mutica mutica) | Reptiles | Trionychidae | Prohibited |
| Spiny Softshell turtle (Apalone spinifer) | Reptiles | Trionychidae | Prohibited |
| Tetraclitella purpurascens (Tetraclitella purpurascens) | Crustaceans | Tetraclitidae | Regulated |
| Clubbed Tunicate (Styela clava) | Tunicate/Sea-squirt | Styelidae | Unlisted |
| Burrowing isopod (Sphaeroma quoyanum) | Crustaceans | Spheromatidae | Prohibited |
| Northern Dwarf siren (Pseudobranchus striatus striatus) | Amphibians | Sirenidae | Prohibited |
| Eastern Lesser siren (Siren intermedia intermedia) | Amphibians | Sirenidae | Prohibited |
| Greater siren (Siren lacertina) | Amphibians | Sirenidae | Prohibited |
| Atlantic salmon (Salmo salar) | Fish | Salmonidae | Regulated |
| Anderson's Salamander (Echinotriton andersoni) | Amphibians | Salamandridae | Prohibited |
| Red-bellied newt (Taricha rivularis) | Amphibians | Salamandridae | Prohibited |
| Pyrenean Brook salamander (Euproctus asper) | Amphibians | Salamandridae | Prohibited |
| Sierra newt (Taricha torosa) | Amphibians | Salamandridae | Prohibited |
| Lake Urmia newt (Neurergus crocatus) | Amphibians | Salamandridae | Prohibited |
| Bosca's newt (Triturus boscai) | Amphibians | Salamandridae | Prohibited |
| Luristan newt (Neurergus kaiseri) | Amphibians | Salamandridae | Prohibited |
| Italian Crested newt (Triturus carnifex) | Amphibians | Salamandridae | Prohibited |
| Chioglossa lusitanica (Chioglossa lusitanica ) | Amphibians | Salamandridae | Prohibited |
| Kurdistan newt (Neurergus microspilotus) | Amphibians | Salamandridae | Prohibited |
| Great Crested newt (Triturus cristatus) | Amphibians | Salamandridae | Prohibited |
| Strauch's Spotted newt (Neurergus strauchii strauchii) | Amphibians | Salamandridae | Prohibited |
| Danube Crested newt (Triturus dobrogicus) | Amphibians | Salamandridae | Prohibited |
| Black Spotted newt (Notophthalmus meridionalis) | Amphibians | Salamandridae | Prohibited |
| Palmate newt (Triturus helveticus helveticus) | Amphibians | Salamandridae | Prohibited |