Rainbow Trout | Steelhead Trout

Pair of elevation illustrations of the Rainbow Trout | Steelhead Trout seen from the side and front

Rainbow Trout (Oncorhynchus mykiss), or Steelhead Trout, receive their name from their silver color and round head. They are members of the family Salmonidae. They are native to North America and the Pacific ocean in Asia’s tributaries, with the Rainbow trout living in freshwater while the Steelhead Trout grow in the ocean but migrate to freshwater to breed.

The Steelhead Trout is larger than its counterpart. However, both species develop differently based on their habitat. Females dig the nest and can spawn multiple times. The rainbow trout has an appealing flavor and is high in vitamin B.

Rainbow Trout have a total length between 20”-30” (51-76 cm), body height of 4.5”-7” (11.4-17.8 cm), and an overall weight in the range of 2-8 lb (.9-3.6 kg). The typical lifespan of the Rainbow Trout is 4-11 years.


*Under Development*

4.5”-7” | 11.4-17.8 cm
20”-30” | 51-76 cm
2-8 lb | .9-3.6 kg
Scientific Name:
Oncorhynchus mykiss
4-11 years


Drawings include:

Rainbow Trout side elevation, front

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Freshwater fish are fish that spend some or all of their live in water with a salinity level lower than .05%. Freshwater fish, due to the segmented nature of ponds, lakes, and rivers, are subject to speciation similar to species on islands.