| Recent evidence has suggested that the Physeteridae family might be more closely related to the baleen whales than to the toothed whales. |
| Although baleen is commonly called whalebone, it is not bone but keratin, the same material as your nails and hair. |
| Different species have different density and coarseness of baleen due to their different food sources. |
| Through the comb-like bristles of its baleen filters, it squirts out the seawater, entrapping krill by the bushel. |
| And the behemoths contain tremendous amounts of oil and baleen, once commercially lucrative products. |
| Their baleen consists of 260-400 black, coarse, broad, overlapping plates hanging from each side of the upper jaw. |
