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 |
|---|---|
| Sockeye salmon (Ozette Lake ESU) (Oncorhynchus nerka pop. 2) | Fish |
| Sockeye salmon (Snake River ESU) (Oncorhynchus nerka pop. 1) | Fish |
| Sonora skipper (Polites sonora sonora) | Butterflies and moths |
| Soupfin (Galeorhinus galeus) | Fish |
| Southern alligator lizard (Elgaria multicarinata) | Reptiles |
| Southern rock sole (Lepidopsetta bilineata) | Fish |
| Speckled sanddab (Citharichthys stigmaeus) | Fish |
| Sperm whale (Physeter macrocephalus) | Mammals |
| Splitnose rockfish (Sebastes diploproa) | Fish |
| Spot shrimp (Pandalus platyceros) | Crustaceans |
| Spotted bat (Euderma maculatum) | Mammals |
| Spotted ratfish (Hydrolagus colliei) | Fish |
| Spotted skunk (Spilogale putorius) | Mammals |
| Spotted taildropper (slug) (Prophysaon vanattae pardalis.) | Molluscs |
| Spruce grouse (Canachites canadensis) | Birds |
| Starry flounder (Platichthys stellatus) | Fish |
| Steelhead (Oncorhynchus mykiss) | Fish |
| Steelhead (Lower Columbia River DPS) (Oncorhynchus mykiss pop. 14) | Fish |
| Steelhead (Middle Columbia River DPS) (Oncorhynchus mykiss pop. 17) | Fish |
| Steelhead (Puget Sound DPS) (Oncorhynchus mykiss pop. 37) | Fish |
| Steelhead (Snake River DPS) (Oncorhynchus mykiss pop. 13) | Fish |
| Steelhead (Upper Columbia River DPS) (Oncorhynchus mykiss pop. 12) | Fish |
| Steller sea lion (Eumetopias jubatus) | Mammals |
| Straits acmon blue (Icaricia acmon sp.) | Butterflies and moths |
| Streaked horned lark (Eremophila alpestris strigata) | Birds |