Blue Water Photography.

Photos taken while in the Open Ocean, Deep water. By definition, there is no bottom in blue-water diving. In fact, any diving where the maxim “if you drop it, it’s gone forever” holds true, even if the bottom is only 50 m (165 ft) deep, could probably be considered “blue water.” The most common applications, however, are in places where the bottom is far deeper than one can see or go while breathing air on SCUBA. Just because you have to be in deep water. The photo doesnt have to have been taken at depth.