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The blue whale is the largest animal known to have lived on Earth. In the Antarctic, NOAA says, blue whales can reach about 110 feet and weigh more than 330,000 pounds.

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The blue whale is the largest animal known to have lived on Earth. In the Antarctic, NOAA says, blue whales can reach about 110 feet and weigh more than 330,000 pounds.ILLUSTRATION · AI

Blue whales are the largest animals known to have lived on our planet, NOAA Fisheries says.

In the Antarctic, blue whales can reach about 110 feet long and weigh more than 330,000 pounds. In the North Atlantic and North Pacific they grow to about 90 feet and more than 100,000 pounds.

They feed almost exclusively on krill. NOAA estimates their lifespan at around 80 to 90 years.

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