There are five species of salmon (Oncorhynchus) in the waters of the North Pacific.
"Scientific American Supplement No. 275" by Various
The rainbow trout (Oncorhynchus mykiss) is a species of salmonid native to tributaries of the Pacific Ocean in Asia and North America.
Seeb, et al., 2012 Signatures of natural selection among lineages and habitats in Oncorhynchus mykiss.
Robust identification of local adaptation from allele frequencies