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454.960 pennyweights is about one-one-hundred-fifty-thousandth as heavy as a Blue Whale.
In other words, it's 0.000006770 times the weight of a Blue Whale, and the weight of a Blue Whale is 148,000 times that amount.
(Balaenoptera musculus)
Blue whales weigh between 67,200,000 pennyweights. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 0.6430 pennyweights each.
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