One thing that’s hard to anticipate during a night dive is when and where you will have a fish encounter. The light you bring is your main source of vision. Fortunately my beam is very strong and penetrating. It’s so strong that I have to point it away from my main subject in order not to overexpose the main subject. Once you have at least one image then you start to experiment. My goal was to get the eel with its mouth open and showing teeth. I just missed seeing his tonsils. And keep in mind, I have a camera in one hand, light in the other, which leave me with needing one more hand ….