Which of the following facts about Sea Otters is most surprising? (poll 6519543)

Which of the following facts about Sea Otters is most surprising?

They can live their entire lives without going onto land

They have the densest fur of any mammal

They hold hands with each other while they sleep

Mommy Sea Otters blow air into baby Sea Otter fur so that it's impossible for the babies even to submerge.

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