Sitting on the water of the Atlantic ocean in Marathon , Florida watching the super moon around 9:30 pm. A bright red object just appeared out of nowhere over the adjacent island about 500 ft up. The object was pulsing red light in no set pattern. It appeared to be hovering at times while ascending. Object made no noise. Flight pattern was erratic. Watched object for about 1 min before it vanished. I thought object was a plane at first but after watching it for a minute i realized it was definitely not an airplane. I was very excited. This is my second sighting in 15 years.