Learn more about a specific fish or wildlife species in Washington.
Species marked with an "AIS" badge are aquatic invasive species. For more information about these environmentally and economically destructive species, visit the Aquatic invasive species page.
| Species | Category |
|---|---|
| Opah (Lampris guttatus) | Fish |
| Opossums (Didelphis virginianus) | Mammals |
| Ord's kangaroo rat (Dipodomys ordii) | Mammals |
| Oreas anglewing (Polygonia oreas) | Butterflies and moths |
| Oregon branded skipper (Salish Sea segregate) (Hesperia comma) | Butterflies and moths |
| Oregon floater (Anodonta oregonensis) | Molluscs |
| Oregon megomphix (Megomphix hemphilli) | Molluscs |
| Oregon silverspot butterfly (Argynnis zerene hippolyta) | Butterflies and moths |
| Oregon spotted frog (Rana pretiosa) | Amphibians |
| Oregon vesper sparrow (Pooecetes gramineus affinis) | Birds |
| Osprey (Pandion haliaetus) | Birds |
| Pacific bluefin tuna (Thunnus orientalis) | Fish |
| Pacific clubtail (dragonfly) (Phanogomphus kurilis) | Arthropods |
| Pacific coast (California market) squid (Loligo opalescens) | Molluscs |
| Pacific coast band-tailed pigeon (Patagioenas fasciata monilis ) | Birds |
| Pacific cod (Gadus macrocephalus) | Fish |
| Pacific cod (south and central Puget Sound) (Gadus macrocephalus) | Fish |
| Pacific giant salamander (Dicamptodon tenebrosus ) | Amphibians |
| Pacific hake (Merluccius productus) | Fish |
| Pacific hake (Georgia Basin DPS) (Merluccius productus) | Fish |
| Pacific halibut (Hippoglossus stenolepis) | Fish |
| Pacific herring (Georgia Basin DPS) (Clupea pallasii) | Fish |
| Pacific lamprey (Entosphenus tridentatus) | Fish |
| Pacific marten (Coastal population) (Martes caurina pop. 3) | Mammals |
| Pacific mole (Scapanus orarius) | Mammals |