Migration of newly planted yearling coho salmon (Oncorhynchus kisutch) out of a Lake Michigan tributary and through the connecting bay was monitored with trap nets and pound nets in April-June 1968 and 1969. Concurrently, food habits of coho and their potential piscine predators were examined. Yearling coho migrated out of the Whitefish River within 2 wk and through northern Little Bay de Noc within 4 wk. They fed primarily on insects and crustaceans in both river and bay. Coho were eaten by only 2 of 221 predatory fishes examined. Thus, yearling coho did not prey upon or compete significantly with native game fishes for food, nor were they utilized as food extensively by resident fishes.