Alaska’s Iliamna Lake harbor seals (IMAGE) Florida Atlantic University Caption Alaska’s Iliamna Lake harbor seals commonly move more than 200 kilometers. Researchers hypothesized that they move regularly between freshwater and marine habitats. Credit David Withrow, NOAA Fisheries Usage Restrictions Credit: David Withrow, NOAA Fisheries 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.