Oncorhynchus kisutch, commonly known as coho salmon, is a popular fish species found in the Pacific Ocean and rivers that flow into it. Coho salmon are known for their silvery scales with a bluish-green back and speckled sides. They are an important species both commercially and recreationally, and are often targeted by fishermen. Other synonyms for Oncorhynchus kisutch include silver salmon, hooknose salmon, and blueback salmon. These names are used interchangeably and can vary regionally. Coho salmon play a vital role in the ecosystem as they are a food source for many predators and their migration patterns help to distribute nutrients throughout the environment.