While on a two-year expedition photographing underwater Papua New Guinea, I had several opportunities to find extraordinarily rare situations or phenomena. A bleached white anemone is one such thing that I had been seeking for my entire career, as the combination of white and red makes for such a striking image. If ocean temperatures elevate for an extended period, stony corals, and rarely some anemones, may expel their zooxanthellae, which is the organism living within the host's tissue that gives it its color. During that time, the anemone may starve unless the water gets cooler again and it regrows its zooxanthellae, and the happy news is that it only took about a month to do so in this case and the anemone recovered fully, returning to its dark green natural color. But during that time, it was the photographic bonanza of my career, as I spent dozens and dozens of hours underwater on the reef capturing different compositions of this most wonderful and rare color combination. It's very likely that it will be a once-in-a-lifetime photographic opportunity, regardless of how many more thousands of hours I put in underwater.

- Chris Gug