Underwater photography comes with its own unique challenges. You are going to need the right gear to capture sharp photos and video in the sea or ocean. The Sea Dragon Duo Underwater Flash is worth a look. It works with a wide variety of cameras and has adjustable brightness.
The Sea Dragon Digital Universal Flash simply adds light and color to your images down to 200 feet. It has variable power adjustment from 8% to 100%. It has a color temperature of 5700K and coverage of 80h x 60v degrees.