My buddy and I went to SANDY's (beach on the South East shore of Oahu, Hawaii). We were sitting in the back/bed of his truck while watching the surf, and trying to chat with the pretty girls in the next vehicle.I took a pic of the ocean, trying to "capture" a wave before it broke.A month or two later I decided to post the pic on Facebook, and as I looked at the image (obviously enlarged on my Facebook page, versus my cell phone screen)... I noticed the disc shape.I enlarged the photo and cannot see any wings. a tail, rotator blades, etc. It has a "penny" shape to it. Unfortunately, I don't remember seeing ANYTHING that day in the sky.Not sure if it is actually a UFO... but like I stated before, I cannot find any other identifying marks (wings, rotator blades, etc.)