Great White sneaks up on Grayson Shepard in Gulf of Mexico Extended Version

My buddies Alex Fogg, Joe Kistel and I had been filming and collecting lionfish at various sites in the Gulf southwest of St. George Island FL. We had been taking turns with Alex and Joe diving together while I dove solo. This was my third and final dive of the day on a man-made structure in 93' feet of water approximately 22 miles due south of St. Vincent Island. The shark enters the camera's field of view at 3:48 and a moment later catches my eye. I instantly recognized it as great white and you can faintly hear me say “Oh my God“. I estimate the fish was 35' or so below me. It spooked me in that it had approached from behind and had already passed me when I saw it. I watched until it swam out of sight then re-cocked my speargun which I usually unload when heading back to the boat as a safety precaution. I glanced around looking for the shark and up at the boat to make sure the dive ladder was indeed down. I noticed a small lionfish had escaped from my bag