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 |
|---|---|---|---|
| Mediterranean Pond turtle (Mauremys leprosa) | Reptiles | Emydidae | Prohibited |
| Zebra mussel (Dreissena polymorpha) | Molluscs | Dreissenidae | Prohibited |
| Quagga mussel (Dreissena bugensis) | Molluscs | Dreissenidae | Prohibited |
| Common Hermit crab (Paguristes frontalis) | Crustaceans | Diogenidae | Regulated |
| Colonial sea squirt (Didemnum vexillum) | Tunicate/Sea-squirt | Didemnidae | Unlisted |
| Idaho giant salamander (Dicamptodon aterrimus) | Amphibians | Dicamptodontidae | Prohibited |
| California Giant salamander (Dicamptodon ensatus (Not: D. tenebrosus; D. copei)) | Amphibians | Dicamptodontidae | Prohibited |
| Fathead minnow (Pimephales promelas) | Fish | Cyprinidae | Prohibited |
| Bighead carp (Hypophthalmichthys nobilis) | Fish | Cyprinidae | Prohibited |
| Black carp (Mylopharyngodon piceus) | Fish | Cyprinidae | Prohibited |
| Grass carp (Ctenopharyngodon idella) | Fish | Cyprinidae | Prohibited |
| Common carp (Cyprinus carpio carpio) | Fish | Cyprinidae | Regulated |
| Silver carp (Hypophthalmichthys molitrix) | Fish | Cyprinidae | Prohibited |
| Wild Goldfish (Carassius auratus) | Fish | Cyprinidae | Regulated |
| Golden Orfe (Leuciscus idus - Golden) | Fish | Cyprinidae | Prohibited |
| Tench (Tinca tinca) | Fish | Cyprinidae | Regulated |
| Silver Orfe (Leuciscus idus - Silver) | Fish | Cyprinidae | Prohibited |
| Triploid Grass Carp (Ctenopharyngodon idella - Tripliod) | Fish | Cyprinidae | Regulated |
| Rudd (Scardinius erythropthalmus) | Fish | Cyprinidae | Prohibited |
| Hellbender (Cryptobranchus alleganiensis) | Amphibians | Cryptobranchidae | Prohibited |
| Chinese Giant salamander (Andrias davidianus) | Amphibians | Cryptobranchidae | Prohibited |
| Alewife (Alosa pseudoharengus) | Fish | Clupeidae | Regulated |
| Walking catfish (Clarias batrachus) | Fish | Clariidae | Prohibited |
| Blackskin catfish (Clarias meladerma) | Fish | Clariidae | Prohibited |
| Vase tunicate (Ciona intestinalis) | Tunicate/Sea-squirt | Cionidae | Unlisted |