Had a very weird encounter with a dolphin once in Provo in the Turks & Caicos. I was snorkeling in about four feet of water off of a sandy beach using a pulse induction metal detector. The water was a little murky, but all of a sudden a dolphin came out of nowhere and began grabbing the transducer ring of the detector in his mouth. He would tug it and then let it go, circle me and then do t again. He seemed to have no fear of me, and when I swam the short distance to the beach, he followed me up to the point he was about to beach himself. I called out to my wife, who came running and got in the water with us. We all three swam back out to deeper water, where he would swim around us in circles, getting close enough to touch. At one point, he turned on his back and flashed an impressive erection. My wife freaked out and swam to shore with him following her all the way. A couple of days later, a local told me the dolphin was a wild dolphin who frequently "played" with folks near that beach.