It has even been found that for the first month after birth, in killer whales and bottlenose dolphins, the mothers and calves will forgo sleep for a month and keep mobile 24 hours a day.

Whales travel through the ocean, lunging, leaping, and playing, with grace and swiftness that belie their huge size. The ...

7) A POD of killer whales sleep by forming a tight circle and ­synchronising their breathing and ­movements. They take breaths together then ­submerge before resurfacing a while later.

Researchers focused on the Salish Sea have made an intriguing discovery about Orcas. These whales, which have continually ...

Scientists documented 34 remarkable cases of wild killer whales trying to give food to humans across four oceans over 20 ...

Wild orcas across four continents have repeatedly floated fish and other prey to astonished swimmers and boaters, hinting that the ocean’s top predator likes to make friends. Researchers cataloged 34 ...

Killer whales are known for their intelligence and power, even an inclination to sink yachts. Now, research is showing how they take down prey that few other animals can. Why it matters: The ...

Then three killer whales’ heads appear, bobbing up and down. The orcas are hunting. On this sheet of sea ice, the nearly thousand-pound seal would be unreachable for most marine predators.

J35, a southern resident killer whale also known as Tahlequah, carried her child's body on her head for 17 days across a distance of 1,000 miles in 2018, according to the Center for Whale Research.

Killer whales bring back wearing salmon hats, but it’s not for fashion. Two orcas from the Pacific Northwest were spotted with dead salmon on their heads, an act first documented in the 1980s.

In 1992, a colleague had returned from a fishing trip in Baja with a story about seeing two killer whales attacking a whale shark. But Ms. Schulman-Janiger was never able to confirm the event.