On my recent trip to Fiji, on my last dive day, I had the resort dive boat all to myself. My wife wanted to hit the spa instead of one last day of diving. Her loss. The guide asked me where I wanted to go today. I said "I want to see Hammerheads." Off we went to a reef we had dove previously, with a giant wall. Visibility here was easily 100’+. We headed out away from the wall into the blank empty blue ocean, all the while descending. After several minutes I could not see the wall behind us or anything in front of us. Above us was just blank light blue and I could sort of tell where the sun would be. Below us was just dark dark dark blue. It was eerie. I couldn’t even tell that I was still descending. My depth gauge hit 119’ and I did my best to level off. But it was much more difficult than usual to hold my depth. Every time I would peer around me my breathing would quicken as I "thought" I saw something. And then I would look at my gauge again and I had dropped another 10 feet. Then my guide pulled a smashed up 7-up bottle out of his wetsuit that I didn’t know he had with him. He pointed at the bottle, then to his eyes, and then straight down, and then back to his eyes. I got the idea. He crinkled the bottle for about 10 seconds and then stopped. Below us, maybe 100 feet? Hard to tell. I saw about fifty dark shapes materialize below us like out of the fog. As they got closer, maybe 60 feet, I could see that the dark shapes were actually Hammerheads. At this point we must have been too close because they descended as quickly as they appeared. I spied them for only maybe 20 seconds. My guide repeated the bottle noise and the hammerheads came back for another peek. A third time worked again. But not the fourth or fifth. So we turned around and headed back the way we came. As we approached the edge of the reef we actually merged with a school of giant barracuda! Another first for me. In all a very memorable and eerie dive.