I don’t do a lot of underwater photography because I don’t live anywhere near the ocean. I have a cheap Ziplock type bag that I intrust my rather expensive camera to. Needless to say, I am a bit nervous that the bag is going to spring a leak every time I use it. It is hard to swim with and make adjustments to the camera, but when it works it can have some amazing results. My wife and I found this turtle and several of his (maybe her) friends while snorkeling in Barbados. We were allowed to hand feed them pieces of squid so I had no problem getting in close.