3 gold balls gather, split to 5 and disappear!

Sarasota, Florida summer 1968 or 69  Beautiful day, some clouds, I'm standing waist deep out in the gulf, looking back towards shore. There are other people, trees, houses ect on the shoreline.
Over the tops of the trees, I see a glowing gold orb, ball shaped, but no way to tell the size, not very big from my vantage point, but very bright.. It sort of darted around some, and then 2 more glowing gold balls showed up.
They all went together in one spot, 2 of them went to the 3rd one, but it didnt get bigger.
But when they were all in one spot, after less than a few seconds, all of the  sudden, 5 split off in different directions up and away, very fast, and were gone.
Whole thing took less than 10 seconds. I can still see the relative scene, but I never could decide how big they were, or how far away. It seems I was rather far out in the water, that area is very flat and you can go 100 yds or more out in the gulf and not be in very deep. The shoreline was very far away as I recall, at least 100 yards.
NO one else seemed to have noticed, and I dont remember anything after that. Sure do remember it tho! They really glowed, and were very golden colored. didnt pulse. Darted around like a hummingbird does, zip zip, back and forth, up and down, nothing we have can do that even now really. It was totally cool and I wish I could see more stuff like that.!!