Manatee, Florida

Photograph by Brian Skerry , National Geographic

A manatee swims in a freshwater spring in Crystal River, Florida . Manatees struggle for survival as the result of a gantlet of threats, from watercraft strikes to toxins in the water. The most serious threat, however, is the loss of warm water due to habitat loss.

(From the National Geographic book Ocean Soul by Brian Skerry )

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