Manatees drift underneath paddleboarders in crystal clear waters

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A pair of standup paddleboarders got a thrill of a lifetime when nearly a dozen manatees swam underneath them near Tampa, Florida.

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Tyler & Lauren get a special treat when this group of manatee swim so gracefully by them in the crystal clear water of the Weeki Wachee River. Thank-you for making SUP Weeki your paddleboard destination!

Posted by SUP WEEKI on Saturday, September 12, 2015

The video was uploaded to Facebook on Saturday by SUP WEEKI, an eco tour company that offers paddleboarding on the Weeki Wachee River, north of Tampa.

At least 10 manatees can be seen swimming quietly in the video, remaining submerged as they pass gracefully below the boarders.

While manatee sightings are not uncommon, seeing such a large group is rare.

"We don't even see one every day so 10 at once is exceptional!" said the company on its Facebook page.