Booming populations of seals, sea lions and other marine mammals are eating so much chinook salmon, they may pose a bigger challenge to the survival of hungry local orca whales than fishermen do ...

Did you know that walruses use their tusks to break off chunks of sea ice? Discover more fascinating facts about these blubbery marine mammals.

Volunteer researchers led by Monika Wieland Shields of the Orca Behavior Institute in Friday Harbor, Washington, estimated transient orcas consumed 1,090 seals in the Salish Sea in 2017 — or ...

The walrus (Odobenus rosmarus), known as Wally, is the first of its species to be spotted off the coast of Cornwall, roughly 2,650 miles (4,260 kilometers) from the animal's home in the Arctic Circle.

Isaak Haberman, a marine biologist in California, said the attack on the gray whales may point to a lack of food availability for the killer whales as they normally feed on seals, sea lions, and ...

Orcas don't usually eat sea otters, but one killer whale died after swallowing seven. Orcas typically hunt porpoises, seals, sea lions, and whales.