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During their migration trips the blue whale can travel thousands of miles from one location to the next. While they migrate most whales will forgo eating food and live primarily off of blubber/body fat and stored calories.
The largest populations occur in the Southern Hemisphere, the North Pacific, and the North Atlantic. In the North Pacific, blue whales can be seen from California up to the Gulf of Alaska and the Aleutian Islands. Wintering grounds are off the coast of southern California, Baja California, Taiwan, Japan and Korea.ength and Weight: The average length of a blue whale is 75 - 80 feet (23 - 24 meters) and these long marine mammals can weigh up to 200,000 pounds (90,000 kg). Whales in the southern hemisphere are generally larger than those in the northern hemisphere.