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 |
|---|---|---|---|
| Sand Ghost shrimp (Biffarius arenosus) | Crustaceans | Callianassidae | Regulated |
| Common Hermit crab (Paguristes frontalis) | Crustaceans | Diogenidae | Regulated |
| Patterned Anthurid (Mesanthura astelia) | Crustaceans | Anthuridae | Regulated |
| Southern Rock lobster (Jasus novaehollandiae) | Crustaceans | Panuliridae | Regulated |
| Green Snapping shrimp (Alpheus euphrosyne) | Crustaceans | Alpheidae | Regulated |
| Sea flea (Nebalia sp) | Crustaceans | Leptostraca | Regulated |
| Nile tilapia (Oreochromis niloticus) | Fish | Cichlidae | Regulated |
| Black Chin tilapia (Sarotherodon melanotheron) | Fish | Cichlidae | Regulated |
| Alewife (Alosa pseudoharengus) | Fish | Clupeidae | Regulated |
| Common carp (Cyprinus carpio carpio) | Fish | Cyprinidae | Regulated |
| Wild Goldfish (Carassius auratus) | Fish | Cyprinidae | Regulated |
| Tench (Tinca tinca) | Fish | Cyprinidae | Regulated |
| Triploid Grass Carp (Ctenopharyngodon idella - Tripliod) | Fish | Cyprinidae | Regulated |
| Mosquito fish (Gambusia affinis) | Fish | Poecilidae | Regulated |
| Varnish clam (Nuttallia obscurata) | Molluscs | Psammobiidae | Regulated |
| Northern green frog (Rana [Lithobates] clamitans) | Amphibians | Ranidae | Regulated |
| Pond slider (Trachemys scripta) | Reptiles | Emydidae | Regulated |
| Clubbed Tunicate (Styela clava) | Tunicate/Sea-squirt | Styelidae | Unlisted |
| Vase tunicate (Ciona intestinalis) | Tunicate/Sea-squirt | Cionidae | Unlisted |
| Colonial sea squirt (Didemnum vexillum) | Tunicate/Sea-squirt | Didemnidae | Unlisted |
| Chain tunicate (Botrylloides violaceus) | Tunicate/Sea-squirt | Botryllidae | Unlisted |
| Golden star tunicate (Botryllus schlosseri) | Tunicate/Sea-squirt | Botryllidae | Unlisted |
| Sea grape tunicate (Molgula manhattensis) | Tunicate/Sea-squirt | Molgulidae | Unlisted |
| Solitary sea squirt (Ciona savignyi) | Tunicate/Sea-squirt | Cionidae | Unlisted |
| Japanese oyster drill (Ocinebrellus inornatus) | Molluscs | Gastropoda | Unlisted |