Adult spring-run Chinook salmon (IMAGE) NOAA Fisheries West Coast Region Caption A returning adult spring run Chinook salmon leaps from the water in California's Central Valley. Credit: Carson Jeffres/UC Davis Credit Carson Jeffres/UC Davis Usage Restrictions Credit required License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.