Oncorhynchus is a genus of fish commonly known as Pacific salmon and trout. This group includes several species, such as Oncorhynchus mykiss (rainbow trout) and Oncorhynchus nerka (sockeye salmon). They are primarily found in the North Pacific Ocean and its tributaries, where they are known for their anadromous life cycle, migrating from freshwater rivers to the ocean and back. These fish are important both ecologically and economically. They serve as a vital food source for various wildlife, including bears and eagles, and are also popular among anglers. Additionally, Oncorhynchus species are significant in commercial fisheries, contributing to local economies and cultural traditions.