From the U.S. Fish and Wildlife Service's online digital media library.
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Pink salmon or humpback salmon, Oncorhynchus gorbuscha, (from a Russian name for this species gorbuscha--горбуша) is a species of anadromous fish in the salmon family Salmonidae. It is the smallest and most abundant of the Pacific salmon.

Metadata
Title: Pink Salmon
Alternative Title: Oncorhynchus gorbuscha
Creator: Knepp, Timothy
Source: WO-ART-52-CDKnepp
Publisher: U.S. Fish and Wildlife Service
Contributor: DIVISION OF PUBLIC AFFAIRS
Language: EN - ENGLISH
Rights: (public domain)
Audience: (general)
Subject: fish, fishes, fisheries, artwork, illustration, illustrations
Date Issued: April 15 2003