There are only five seal populations worldwide that live year-round in freshwater habitats. The Baikal seal, probably the ...

In Alaska, harbor seals thrive in the chilled water of Iliamna Lake, sliding their blubbery bodies onto floating pieces of ...

Alaska’s Iliamna Lake harbor seals commonly move more than 200 kilometers. Researchers hypothesized that they move regularly between freshwater and marine habitats.

Alaska’s Iliamna Lake harbor seals have been difficult to study because of their remoteness. They weren’t even identified as ...