1. Krill are the principal food of the baleen whales, such as the blue whale and minke.

2. The cetaceans are divided into two groups: the baleen whales which have whalebone instead of teeth and the toothed whales.

3. In order to porpoise, baleen whales must reach four times their normal cruising speed - probably beyond their capabilities.

4. Baleen whales often appear in this region. Be careful!

5. But big baleen whales often run silent.

6. Other baleen whales have splash guards too, but not like this.

7. Other baleen whales are the blue, fin, gray, humpback, and sei whales and the rorqual.

8. But it is easier to hear the baleen whale, with its lower-frequency call, than the beaked whales, says Theriault.

9. Large baleen whales primarily use the lower frequencies and are often limited in their repertoire.

10. The region is one of the chief feeding grounds of the sperm, baleen and minke whales.

10. try its best to gather and build good sentences.

11. Whales are divided into two main groups, toothed whales and baleen whales.

12. Baleen whales, including the humpback whales and blue whales, are toothless and instead use hairlike structures called baleen to filter tiny prey such as krill from seawater.

13. Its calls do not match those of any known species, although they are clearly those of a baleen whale, a group that includes blue, fin and humpback whales.

14. Evoking the poster for the original summer blockbuster, a new species of killer sperm whale attacks a baleen whale in an illustration.

15. Later in the evolution of whale hearing, the toothed and baleen whales parted ways.

16. The seabirds abandoned fish in favor of krill, shrimp-like crustaceans that are a major component in the diets of fur seals and baleen whales.

17. "When we saw its huge teeth, we knew it couldn't be a baleen whale.

18. Surfacing in warm winter waters off the Baja California coast, a gray whale flashes its baleen plates by a boat.

19. The collection of small marine crustaceans of the order Euphausiacea are the principal food baleen whales.

20. A study in the journal Science shows that bony fish filter-feeders spent 100 million years developing and occupying the niche that baleen whales do now.

21. Unlike orca, which are odontocetes or toothed whales, humpbacks are mysticetes, harmless leviathans with only baleen plates in their mouths.

22. One group of whales has, instead of teeth, long strips of bone, hanging from their upper jaw. This is the baleen whale, the largest animal in the world.