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 |
|---|---|
| Olympia oyster (Ostrea lurida) | Molluscs |
| Olympia pebblesnail (Fluminicola virens) | Molluscs |
| Olympia pocket gopher - Mazama species (Thomomys mazama pugetensis) | Mammals |
| Olympic marmot (Marmota olympus) | Mammals |
| Olympic mudminnow (Novumbra hubbsi) | Fish |
| Olympic pocket gopher - Mazama species (Thomomys mazama melanops) | Mammals |
| Olympic torrent salamander (Rhyacotriton olympicus) | Amphibians |
| One-band juga (Juga sp. 8) | Molluscs |
| 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 |