I recently went cage shark diving in South Africa and below are a couple of examples of shots I got. I was shooting a Canon G12, RAW format, 1/250 shutter speed (messed around with this a bit and found this to work best) and auto ISO. Due to the nature of the cage diving, I was explicitly told I was not allowed to take strobes in with me. So it was just the camera, the housing, and the wide angle port attached to the housing.
I'm unhappy with the amount of backscatter present in the photos, so I'm just wondering if there's a way that might be avoided in the future should I do something similar? Are there more suitable camera settings I should consider? I would appreciate any constructive feedback!