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Animal Hall of Fame: Smallest

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Marine mammal

Sea otters weigh between 35 and 90 pounds. They sleep while floating on their backs on the surface of the water. Sea otters are the only otters that give birth in water. Their ears and nostrils close up when they go underwater.

Infoplease

Provided by Infoplease — an authoritative, comprehensive reference website that offers an encyclopedia, a dictionary, an atlas, and several almanacs. Visit Infoplease.com to find more resources endorsed by teachers and librarians.