Others have teeth to catch and rip their food, which may consist of plankton, krill, or fish. Plankton are microscopic plant and animal organisms floating in water in large numbers. Krill are small crustaceans. Baleen whales usually do not go as deep as toothed whales because their food is near the surface. A baleen whale can gulp or skim krill from the water.
Humpbacks are baleen whales.
They spend three or four summer months off Alaska. During that time, they consume a full year's supply of food. Each whale species has its own variety of sound or song, which can be a click, groan, whistle, creak, burp, cry, scream, or chirp. Some sounds are inaudible to humans but can be heard by other whales thousands of miles away. Whales migrate to warmer waters in winter.