Alright, I'm getting the technical part of the camera handling down. But I'm running into shooting technique. Take a look at this scene that I just got:
(Why all of the sudden I can't embed a Youtube clip?)
If I focus on the tiny fish, the ribbon eel will be out of focus, if I focus on the eel, the tiny fish will be out of focus (so you won't know what the eel is trying to eat). I'm shooting with the Panasonic LX100, in manual focus mode with focus peaking. It won't make sense to pick up the camera and move the focus between the eel and the fish, focus pulling between the eel and the small fish are not feasible because the eel keep moving. If I use AF mode, I think the camera will keep hunting focus between the tiny fish and the eel. The eel being almost all black will throw the camera's AF off.
I have closed my aperture pretty small to flatten the depth of field, if I close it further, I will have to bump up the ISO and cause more noise. This is shot in ambient light with custom white balance. I don't think a video light would make any different.
So, if you're in my situation, what would you do differently?