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 |
|---|---|---|---|
| Smooth Softshell turtle (Apalone mutica mutica) | Reptiles | Trionychidae | Prohibited |
| Spiny Softshell turtle (Apalone spinifer) | Reptiles | Trionychidae | Prohibited |
| Florida Softshell turtle (Apalone ferox) | 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 |
| Eastern newt (Notophthalmus viridescens) | Amphibians | Salamandridae | Prohibited |
| Southern Crested newt (Triturus karelinii) | Amphibians | Salamandridae | Prohibited |
| Spotted Paddle Tail newt (Pachytriton brevipes) | Amphibians | Salamandridae | Prohibited |
| Marbeled newt (Triturus marmoratus marmoratus) | Amphibians | Salamandridae | Prohibited |
| Spotless Paddle Tail newt (Pachytriton labiatus) | Amphibians | Salamandridae | Prohibited |
| Carpathian newt (Triturus montandoni) | Amphibians | Salamandridae | Prohibited |
| Spot-Tailed Warty newt (Paramesotriton caudopunctatus) | Amphibians | Salamandridae | Prohibited |
| Banded newt (Triturus vittatus ophryticus) | Amphibians | Salamandridae | Prohibited |
| Chinese Warty newt (Paramesotriton chinensis) | Amphibians | Salamandridae | Prohibited |
| Smooth newt (Triturus vulgaris lantzi) | Amphibians | Salamandridae | Prohibited |
| Tam Dao Warty newt (Paramesotriton deloustali) | Amphibians | Salamandridae | Prohibited |
| Hong Kong Warty newt (Paramesotriton hongkongensis) | Amphibians | Salamandridae | Prohibited |
| Spectacled salamander (Salamandrina terdigitata) | Amphibians | Salamandridae | Prohibited |
| Anderson's Salamander (Echinotriton andersoni) | Amphibians | Salamandridae | Prohibited |
| Red-bellied newt (Taricha rivularis) | Amphibians | Salamandridae | Prohibited |