Cave photography is one of the most difficult challenges in technical diving. Working in the complete darkness with additional task and stress loads is difficult. Here are a few tips to maximize your potential for bringing home great shots.
Work in the doorway of the cavern zone. Look out and up and maximize the use of ambient light.
Shoot 1/125th shutter speed or faster to freeze the beams of light cascading into the cavern.
Balance your exposure for the ambient light then supplement the shot with subtle strobe fire to illuminate only the foreground.
Have your dive partner carry a slave strobe to illuminate the tunnels of the cave.
Place a large video reflector on primary cave lights to soften and widen the beam for focusing or fill light.