Hundreds of manatees cuddle up in warm Fla. spring water

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A popular Florida spring was closed to tourists because 300 manatees came together, trying to keep warm.

A video was posted to Citrus County's Facebook page and has more than 500,000 views in under 24 hours.

Video of manatees outside Three Sisters Springs in Crystal River Florida this morning.  U.S. Fish and Wildlife Service estimates about 300 manatees were using the spring as a warm water shelter this morning.

Posted by Citrus County, Florida :: The Water Lover's Florida on Monday, February 8, 2016

Staff at the Crystal River National Wildlife Refuge closed the spring to visitors, as more manatees were expected to seek out the warm waters at Three Sisters Springs, WTVT reported.