Two severed fins bearing the tooth marks of other killer whales have raised a troubling question: are some orcas hunting their own kind?

SEATTLE — The mother orca known as J35, or Tahlequah, has been seen carrying her deceased calf for at least 11 days, drawing attention to the critically endangered southern resident killer whales.

Blue whale calves enter the world already the size of a bus, yet they still face danger. A hungry killer whale sees a slow, ...

Add Yahoo as a preferred source to see more of our stories on Google. A pod of orcas put on an unexpected appearance in Seattle, thrilling onlookers with a rare hunting display near the shore, ...

John Ford still recalls the first time he heard them. He’d been puttering around the Deserters Group archipelago, a smattering of spruce- and cedar-choked islands in Queen Charlotte Strait, between ...