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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.
Blue whales are rorqual whales, whales that have pleated throat grooves that allow their throat to expand during the huge intake of water during filter feeding. Blue whales have 50-70 throat grooves that run from the throat to mid-body. SIZE Blue whales grow to be about 80 feet (25 m) long on average, weighing about 120 tons (109 tonnes). The largest specimen found was a female 94 feet (29 m) long weighing more 174 tons (158 tonnes). The females are larger than males, as with all baleen whales.