Juvenile Coho (IMAGE) University of California - San Diego Caption Young salmon like these are vulnerable to dry conditions in the small streams they call home. Their survival is a bottleneck to the recovery of the Russian River coho salmon. Credit California Sea Grant Usage Restrictions with credit 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.