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A blue whale can weigh as much as 200 short tons (400,000 lbs). An adult blue whale can weigh up to around 180 metric tons (400,000lbs). A blue whale can weigh as much as 200 short tons (400,000 lbs).An adult blue whale can weigh up to around 180 metric tons (400,000lbs). A blue whale calve can weigh up to 2.7 metric tons (almost 6000lbs)
Beluga whales weigh up to 2000-3500lbs and on average their weight is 3150lbs that is 1430kg. Belugas have a size relative to a bus, their average length ranges from 10 to 15 feet and in some rare cases may reach up to 20 feet. Their babies are only 3feet long. Unlike other whales the belugas have flexible necks and can rotate their heads in all directions. In wild they can live up to 35 to 50 years.