The largest animals ever owe their size to feeding on the tiniest creatures in the sea, but their survival requires a minimum body size.

Two populations of orcas in the Pacific Northwest and British Columbia are faring very differently. The way they hunt may be a factor.

For male humpback whales, singing may no longer be in vogue when it comes to seduction, researchers report.

Whales eat more tiny specks of plastic than previously thought. And nearly all of it comes from the animals they eat, not the water they gulp.

Southern right whale mothers pick nursery sites in shallow waters so predators can't hear communication between them and their babies, researchers say.

Observations of song learning among humpback whales indicate "a level of 'cultural transmission' beyond any observed non-human species."

After an entanglement with fishing gear, most North Atlantic right whales die witin three years. Estimates say there are fewer than 350 left in the wild.

New research contradicts the nearly universal belief that humpback whales learn their songs from other whales. Not so, says one researcher.

The North Atlantic right whale is one of the most endangered whales in the world. A new welfare assessment tool may help draw attention to the problem.

A group of orcas, also called killer whales, took down a blue whale near Australia. A whale biologist explains this extreme kind of predation.