My wife got this video a few days before Christmas while we were at a beach on Anna Marie Island. A dolphin suddenly appeared in waist deep water approx. 30yds away from my 11yr old son. It is swirling and splashing the water. It suddenly takes off across in front of him, rising up and appearing to look at him. In the distant, on the upper left side, there is a brief glimpse of another fin, but I can’t tell if it's another dolphin or "something else" I was told afterwards by my mother that dolphins will put themselves between danger and people, especially if they are near the shore...We didn't know this at the time.