I did that once in the intracoastal waterway here in surfside. They weren't quite that close, but there were like 20 or 25 of them all around me.
There was a crowd of folks on the shore just watching them swim around me. I just cut my motor and splashed my hands and feet in the water to keep them jumping and moving around. They only got within maybe 20 feet of me, at the closest.
it was still pretty cool