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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)
Related Articles. Also known as killer whales, orcas measure from 23 to 32 feet and weigh up to six tons. They're as big as school buses, and seeing these incredible creatures with their signature black-and-white coloring is an experience you won't soon forget.