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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.
How big is a Blue Whale? The blue whale may be the largest animal ever to inhabit the earth. It may have reached lengths of up to 31 meters (100 feet)--roughly the length of a basketball court. Blue whales have weighed up to 146 metric tonnes (160 tons). They feed on small shrimp-like crustaceans.