There are only five seal populations worldwide that live year-round in freshwater habitats. The Baikal seal, probably the most well-known, lives in the deepest, oldest lake in the world, 1,600 ...

In Alaska, harbor seals thrive in the chilled water of Iliamna Lake, sliding their blubbery bodies onto floating pieces of ice for a winter rest. This group of round-eyed water dwellers has remained a ...

Iliamna Lake harbor seals, members of one of the world's five freshwater seal populations, rest on the ice surface of Alaska's biggest lake in this undated photo. Their ability to live in an ...

Alaska's Iliamna Lake harbor seals have been difficult to study because of their remoteness. They weren't even identified as harbor seals until 2013. Now, a new genetic study has found significant ...