Baleen whales lost their teeth gradually, replacing them fully with baleen about 20 million years ago. We know a lot about baleen whales, which include blue whales, humpbacks, ...

Most species of baleen whale travel between 1,800 and 3,000 miles each way. Southern populations of humpback whales leave their Antarctic feeding grounds in January every year and spend three ...

Baleen whales evolved bristly baleen plates instead of teeth, which filter or trap krill, plankton and small fish inside their mouths. The 14 baleen species include the rorqual family—slender, ...

Blue whales, the largest animals on Earth, use their baleen to feed on some of the ocean’s smallest animals. This feeding-in-action drone footage was captured by Oregon State University.

Scientists made an incredible discovery last year: a small, "unique" group of baleen whales in the Gulf of Mexico that make up an entirely new species. The whales — up to 60,000 pounds each ...

Baleen whales eat (and poop) a lot more than we realized. In a single day, a blue whale can gulp down the caloric equivalent of 30,000 Big Macs.

Baleen whales — which capture krill, fish, zooplankton and squid by filtering seawater through their special structures in their mouths — may consume up to three times more prey than ...

For baleen whale prey, they used acoustic devices to test the density of krill patches. For toothed whales, they looked at the size and quantity of squid beaks and otoliths ...

Understanding how baleen whales track down their prey could help scientists predict where the whales will go to feed—and better manage human activities in those areas that might harm the whales.