Thank you Eric Cheng for making the ProRes 422 700Mbps clip available for us to examine. The white balance of the original footage is excellent. Is it right out of the camera? The details and dynamic range this system captures are amazing.
Since I dive the California kelp forests often, this is my suggestion on grading to restore some of the kelp colors. It's just a quick adjustment, masks should be used to add more contrast in the mid-tone areas.
I'll remove this image in case it violates Wetpixel copyright policy.