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404 kilograms is about seven-tenths as as The Heart of a Blue Whale.
In other words, the of The Heart of a Blue Whale is 1 times that amount.
(Balaenoptera musculus) (adult)
The heart of a blue whale weighs about 600 kg. These hearts pump an estimated 7,100 L (1,875 gal) of blood through the whale's massive body.
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