Another picture from Baja. I was in the other panga when I took this picture. I know it looks like the whale has either been hit in the head by the little boat, or is trying to consume it bow first, but she's really just using in for a 'toothpick.' Or her baleen itched.
Gray whales are baleen whales. Orcas, dolphins, and Sperm whales are in the toothed whale family. Baleen functions like a giant sieve. The whale vacuums up microscopic organisms from the sea floor, and pushes the water and sand out through the baleen with its thousand pound tongue. What's left is dinner.