Night diving makes everything look better. The colors are more intense and the background goes to black. Another challenge is how much of the fish is necessary to include in the image. A close up may tell more by showing less. One thing I like is that the ocean is like a big light box and diffuser of sunlight. Still the exposures tend to be long when you are at thirty feet below. Either way it’s always nice to have something different. So you shoot and try to experiment. I recently read that to ward off brain aging it’s good to be engaged learning activities. Photography is an excellent hobby in this regard. Now if only I could remember what I had for breakfast. Did I…?