Salmo scouleri (now Oncorhynchus gorbuscha) - The Pink Salmon
Sometimes known as the humpback salmon or humpie, due to the humped back that males develop during spawning season.
Like all salmon, clearly one of the top predators in its ecosystem. The pink salmon is the smallest and most abundant of their family, but is still imperiled within California (though they only exist as far south as Sacramento) and Washington. On the West Pacific (throughout the Siberian and part of the Korean coastline), within British Columbia, and in Alaskan populations, the species is stable.
Fauna Boreali-Americana; or the zoology of the northern parts of British America.: containing descriptions of the objects of natural history collected on the late northern land expeditions, under the command of Sir John Franklin. Part 3: The Fish. John Richardson, 1836.
(via scientificillustration)