Walking alone on a remote beach in southwest Florida, I was startled to hear splashes and a deep sigh coming from the water just offshore.

As I squinted in the direction of the sounds, the rounded gray back of a sea creature rose amid a red froth, rolled turbulently at the surface, and then sank back into the Gulf. Moments later a broad nose emerged and exhaled in a great snuffling breath. It was a manatee, and by the looks of the reddish-colored water and the way it was thrashing, it was in trouble.

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