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 |
|---|---|---|---|
| Alewife (Alosa pseudoharengus) | Fish | Clupeidae | Regulated |
| Green Snapping shrimp (Alpheus euphrosyne) | Crustaceans | Alpheidae | Regulated |
| California Tiger salamander (Ambystoma californiense) | Amphibians | Ambystomatidae | Prohibited |
| Blue-spotted salamander (Ambystoma laterale) | Amphibians | Ambystomatidae | Prohibited |
| Marbled salamander (Ambystoma opacum) | Amphibians | Ambystomatidae | Prohibited |
| Tarahumara salamander (Ambystoma rosaceum) | Amphibians | Ambystomatidae | Prohibited |
| Bowfin, Grinnel, or Mudfish (Amia calva) | Fish | Amiidae | Prohibited |
| Three-toed Amphiuma (Amphiuma tridactylum) | Amphibians | Amphiumidae | Prohibited |
| Chinese Giant salamander (Andrias davidianus) | Amphibians | Cryptobranchidae | Prohibited |
| 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 |
| Giant Tasmanian crayfish (Astacopis gouldi) | Crustaceans | Parastacidae | Prohibited |
| Spiny crayfish (Astacopis tricornus) | Crustaceans | Parastacidae | Prohibited |
| Alligator Gar (Atractosteus spatula) | Fish | Lepisosteidae | Prohibited |
| Gorgan salamander (Batrachuperus gorganensis) | Amphibians | Hynobiidae | Prohibited |
| Paghman Mountain salamander (Batrachuperus mustersi) | Amphibians | Hynobiidae | Prohibited |
| Persia Mountain salamander (Batrachuperus persicus) | Amphibians | Hynobiidae | Prohibited |
| Western Chinese Mountain salamander (Batrachuperus pinchonii) | Amphibians | Hynobiidae | Prohibited |
| Taibai Stream salamander (Batrachuperus taibaiensis) | Amphibians | Hynobiidae | Prohibited |
| Sand Ghost shrimp (Biffarius arenosus) | Crustaceans | Callianassidae | Regulated |
| Chain tunicate (Botrylloides violaceus) | Tunicate/Sea-squirt | Botryllidae | Unlisted |
| Golden star tunicate (Botryllus schlosseri) | Tunicate/Sea-squirt | Botryllidae | Unlisted |
| Spiny waterflea (Bythotrephes cederstroemi) | Crustaceans | Cercopagidae | Prohibited |
| Wild Goldfish (Carassius auratus) | Fish | Cyprinidae | Regulated |