With an average weight of 110 tons (the same as around 22 African elephants), the blue whale is currently believed to be the heaviest animal that has ever existed on Earth. The blue whale has a pleated throat, allowing its mouth to expand and hold up to 90 tons of water.
However, blue whales only consume tiny sea creatures, such as shrimp-like krill, which they filter from seawater through bristles called baleen.
While it is possible that a blue whale could accidentally suck a human into its mouth, this has never been recorded. If it did happen, the whale would not be able to swallow an adult human as the passage through which food passes to its stomach averages only one foot (about a third of a meter) in diameter.
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