Aquarium staff euthanized Barney, a "super senior" harbor seal. He showed signs of "an acute decline," according to a post on the aquarium's website.

Exclusively in Iliamna Lake, Alaska’s largest body of freshwater, lives a small population of rare freshwater seals — one of only two freshwater harbor seal populations in the world. Alaska natives, ...

The Oregon coast supplies habitat for about 10,000 to 12,000 harbor seals (Phoca vitulina richardii) year-round, but the animals’ specific range was long unknown. To model the seals’ movements, ...

When the carcasses of headless baby harbor seals began emerging on the Northern California coastline close to a decade ago, researchers hadn’t seen anything like it before. The thick mats of ice ...