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 |
|---|---|---|---|
| Australian Porcelain crab (Petrocheles australiensis) | Crustaceans | Porcellanidae | Regulated |
| Burrowing isopod (Sphaeroma quoyanum) | Crustaceans | Spheromatidae | Prohibited |
| Chinese mitten crab (Eriocheir sinensis) | Crustaceans | Grapsidae | Prohibited |
| Common Hermit crab (Paguristes frontalis) | Crustaceans | Diogenidae | Regulated |
| European green crab (Carcinus maenas) | Crustaceans | Portunidae | Prohibited |
| Fishhook waterflea (Cercopagis pengoi) | Crustaceans | Cercopagidae | Prohibited |
| Gammarella berringar (Gammarella berringar) | Crustaceans | Melitidae | Regulated |
| Giant Tasmanian crayfish (Astacopis gouldi) | Crustaceans | Parastacidae | Prohibited |
| Gippsland crayfish (Euastacus kershawi) | Crustaceans | Parastacidae | Prohibited |
| Glenelg crayfish (Euastacus bispinosis) | Crustaceans | Parastacidae | Prohibited |
| Green Snapping shrimp (Alpheus euphrosyne) | Crustaceans | Alpheidae | Regulated |
| Lamington Spiny crayfish (Euastacus sulcatus) | Crustaceans | Parastacidae | Prohibited |
| Land Yabby (Parastacoides tasmanicus tasmanicus) | Crustaceans | Parastacidae | Prohibited |
| Land Yabby (Geocharax falcata) | Crustaceans | Parastacidae | Prohibited |
| Murray crayfish (Euastacus armatus) | Crustaceans | Parastacidae | Prohibited |
| Northern crayfish (Orconectes virilus) | Crustaceans | Cambaridae | Prohibited |
| Orange fingered Yabby (Cherax depressus) | Crustaceans | Parastacidae | Prohibited |
| Orange fingered Yabby (Cherax destructor) | Crustaceans | Parastacidae | Prohibited |
| Patterned Anthurid (Mesanthura astelia) | Crustaceans | Anthuridae | Regulated |
| Red swamp crawfish (Procambarus clarkii) | Crustaceans | Cambaridae | Prohibited |
| Ringed crayfish (Orconectes neglectus) | Crustaceans | Cambaridae | Prohibited |
| Rough Shore crab (Cyclograpsus granulosus) | Crustaceans | Grapsidae | Regulated |
| Rusty crayfish (Orconectes rusticus) | Crustaceans | Cambaridae | Prohibited |
| Sand Ghost shrimp (Biffarius arenosus) | Crustaceans | Callianassidae | Regulated |
| Sea flea (Nebalia sp) | Crustaceans | Leptostraca | Regulated |