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Which mammal is the largest marine mammal?

Quick Answer

The blue whale is the largest marine mammal and the largest animal ever known, reaching about 30 meters long.

The Full Story

The blue whale is the largest marine mammal by a huge margin. The biggest individuals can reach around 30 meters in length and weigh well over 100 metric tons. No other living animal comes close to its size. It is also the largest animal known to have ever lived on Earth.

Key Facts

1.Blue whales can reach about 30 m in length
2.They can weigh well over 100 metric tons
3.They are the largest animals ever known

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"The biggest mammal that has ever existed in the ocean"

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