Scientific Name: Oncorhynchus mykiss
Appearance: Steelhead Trout and Rainbow Trout are actually the same species. The only difference between the two is that Rainbow Trout stay in fresh-water, where as Steelhead Trout travel to salt-water and become a more blue-silver color. Average adults weigh around 20 pounds and measure around 15 inches in length.
Range: They are found mostly in the Pacific Ocean; however, they are endangered around the southern California Coast and the Washington and Oregon Coasts.
Why they are disappearing: Steelhead Trout are endangered mostly because of the increasing levels of water pollution. These toxins include industrial waste, fertilizers, household cleaners and natural waste that have seeped from storm drains into the rivers.