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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)
1 A whale tongue may weigh as much as an elephant. 2  A blue whale is big-hearted! Its heart can weigh close to 2,000 pounds (~907 kg) which is as heavy as a small car.  A blue whaleâs big heart beats loudly and can be detected from two miles away and a human can easily crawl through its major arteries.