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 |
|---|---|---|---|
| Rough Shore crab (Cyclograpsus granulosus) | Crustaceans | Grapsidae | Regulated |
| Chinese mitten crab (Eriocheir sinensis) | Crustaceans | Grapsidae | Prohibited |
| Common Hermit crab (Paguristes frontalis) | Crustaceans | Diogenidae | Regulated |
| Fishhook waterflea (Cercopagis pengoi) | Crustaceans | Cercopagidae | Prohibited |
| Spiny waterflea (Bythotrephes cederstroemi) | Crustaceans | Cercopagidae | Prohibited |
| Ringed crayfish (Orconectes neglectus) | Crustaceans | Cambaridae | Prohibited |
| Northern crayfish (Orconectes virilus) | Crustaceans | Cambaridae | Prohibited |
| Red swamp crawfish (Procambarus clarkii) | Crustaceans | Cambaridae | Prohibited |
| Rusty crayfish (Orconectes rusticus) | Crustaceans | Cambaridae | Prohibited |
| Sand Ghost shrimp (Biffarius arenosus) | Crustaceans | Callianassidae | Regulated |
| Patterned Anthurid (Mesanthura astelia) | Crustaceans | Anthuridae | Regulated |
| Green Snapping shrimp (Alpheus euphrosyne) | Crustaceans | Alpheidae | Regulated |