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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 begin mating between 5-10 years of age. Females are pregnant for about 11 months and females get pregnant approximately every two to four years. Calves can gain 200 lbs. each day while nursing. Mother and calf form a very close bond, with the baby often swimming close to its mother.lue whales can grow to be about 100 feet (30.5 meters) in length and may weigh around 160 tons. They are mottled bluish gray, with broad flat heads and a small dorsal fin located in the last forth of the body. Newborn blue whales are about 23 feet (7 meters) long and roughly 30 tons and can add 200 pounds a day!