Click on any photo to enlarge...see a slide show:
It appears that she spent the night in the warmth and security of the boat basin.
"Manatees...are large, fully aquatic, mostly herbivorous marine mammals sometimes known as sea cows. There are three accepted living species...the Amazonian manatee, the West Indian manatee, and the West African manatee.... They measure up to 13 feet (4.0 m) long, weigh as much as 1,300 pounds...and have paddle-like flippers." (Wikipedia)
Mildred hanged around for about half an hour and then slowly found her way out of the basin and back to Florida Bay.
We saw two pods of dolphins...
(Got photos of only the dolphins.)