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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)
Mature killer whales are typically longer and lighter than elephants. On average, killer whales weigh up to 6 tons, or 12,000 pounds, while an average male elephant can weigh up to 7.5 tons, or 15,000 pounds. Killer whales are 23-32 feet long, and elephants range in height from 8 to 13 feet.