Red Sockeye Salmon in the River (IMAGE) U.S. National Science Foundation Caption When sockeye salmon migrate from salt water to fresh water, they change color--going from their ocean colors of mostly silver with some darker coloration on their backs (like a lot of other ocean fish) to red when in fresh water. Credit Dr. Tom Quinn, University of Washington Usage Restrictions None License Licensed 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.