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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.
LENGTH AND WEIGHT. The longest blue whale ever recorded was a 108-foot adult female caught during whaling efforts in Antarctica! In modern times, blue whales in the Southern Hemisphere reach lengths of 90-100 feet , but their Northern Hemisphere counterparts are smaller, on average 75 to 80 feet (23 to 24.5 m).