Steelhead Trout (IMAGE) EurekAlert! Caption <p>These are steelhead trout drift in an Oregon stream. <p>Related news release: <a href="https://www.eurekalert.org/pub_releases/2016-02/osu-des021216.php">DNA evidence shows that salmon hatcheries cause substantial, rapid genetic changes</a> Credit Photo by John McMillan, courtesy of Oregon State University 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.