Found while snorkling for bottles . A professor at VSU verified that it is agatized coral from the withlacoochee river. approx 10-15 million years old. It has water or a fluid of some kind locked inside of it. I do have video footage of this but it isn't real clear. these are the best photos I could get. Anyone with information or value on this fossil please contact me at punkin1524rctw@yahoo.com