Underwater photography is all about color compensation. Red is the first color you lose as you dive deeper. Using red filters in front of the camera lens or hue correction in photo editing programs can restore “warmth” to the underwater pictures.
I really like finding scenes that display a wealth of rich colors with vibrant reds next to cool blues and I have been working on aligning myself just right with the sunlight to capture the rainbow of undersea colors. Perfect buoyancy control is also key to do all the body manipulations and achieve a good angle to get the best shot.