The turquoise fauna is actually a "purple anemone". The blue color of the photo is what it looks like at depth due to the physics of light refraction by water. As you go down, you gradually lose the colors of the spectrum, and red, orange, and yellow are the first to go. When we took a picture using the underwater strobe of that same anemone, it was a brilliant purple color. I like the blue color of the naturally lit version better.

I was about 3 feet to thr right of the photographer pointing out the bigger shark behind the closer one. We do have a picture of me on the other side of a large tagged turtle. I will see if I can get it posted tonight or tomorrow.