The Coho Salmon (Oncorhynchus kisutch) is an important species in Pacific Northwest ecosystems, known for its remarkable life cycle and ecological significance. Born in freshwater streams, coho salmon spend the first year or more of their lives in cool, clean rivers where they develop strength and feeding skills. Once they reach the smolt stage, they migrate to the ocean, adapting physiologically to saltwater as they begin the next chapter of their journey.

In the marine environment, coho salmon feed on fish, squid, and crustaceans, growing rapidly during their one to two years at sea. Their silver bodies and streamlined shape make them efficient swimmers capable of traveling long distances. As adults, they return to their natal streams to spawn, guided by an extraordinary sense of smell that allows them to locate the exact waterway where they were born.

During spawning season, males develop bright red bodies and hooked jaws, while females prepare gravel nests called redds. After spawning, both males and females typically die, contributing nutrients to the surrounding ecosystem. This nutrient transfer supports forests, insects, birds, and mammals, making coho salmon a cornerstone species in their environment.

Studying coho salmon helps scientists understand watershed health, habitat restoration, and the intricate links between freshwater and marine ecosystems.

Swim over to the Pacific Pavillion to see these fish.