Recently Hatched Salmon (image) DOE/Pacific Northwest National Laboratory Caption These are recently hatched fall Chinook salmon from the Columbia River. The fish that still have their yolk sacs attached are known as alevins. Credit Photo courtesy of PNNL Usage Restrictions None 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.