This was a basic UW 3 megapixel setup by Sealife, ie Reefmaster 310.... that was the camera and one of the shots that got me hooked on photography.......and led to land photography that led to that led to...it was ambient light at about 30 ft in very clear water off Cozumel, MX......
it is actualy a "Spotted Eagle Ray", that is the tail..
my current UW rig is far more sophisticated, but I don't know it as well yet either.....more pics later.