Steelhead Trout
Steelhead Trout
Oncorhynchus mykiss
Protected Status
Quick Facts
About the Species
Steelhead trout are a unique species. Individuals develop differently depending on their environment. All steelhead trout hatch in gravel-bottomed, fast-flowing, well-oxygenated rivers and streams. Some stay in fresh water all their lives, and are called rainbow trout. Steelhead trout that migrate to the ocean typically grow larger than the ones that stay in freshwater. They then return to freshwater to spawn. Steelhead trout are vulnerable to many stressors and threats including blocked access to spawning grounds and habitat degradation caused by dams and culverts. One distinct population segment is listed as endangered and 10 DPS’ and 1 experimental non-essential population are listed as threatened under the Endangered Species Act.
NOAA Fisheries is committed to conserving and protecting steelhead trout. Our scientists and partners use a variety of innovative techniques to study, learn more about, and protect this species.
ESA Endangered
- Southern California DPS
ESA Threatened
- California Central Valley DPS
- Central California coast DPS
- Lower Columbia River DPS
- Middle Columbia River
- Northern California DPS
- Puget Sound DPS
- Snake River Basin DPS
- South-Central California coast DPS
- Upper Columbia River DPS
- Upper Willamette River DPS
ESA Experimental Population
- Middle Columbia River XN
Scientific Classification
| Kingdom | Animalia | Phylum | Chordata | Class | Osteichthyes | Order | Salmoniformes | Family | Salmonidae | Genus | Oncorhynchus | Species | mykiss |
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