You know I was watching Finding Nemo today and realized their caustics Re just shadows. I than went online and tried to research underwater cameras, and it seems this chromatic effect is just the result of pressurized cameras inside a box viewing through tempered glass. This isn't found in high-end imagining like 8k sports cameras and stuff from National Geographic and Discovery. Leads me to think this is just the quality/condition (surface wscratches wear) on tempered glass often reused even if camera is removed.
Low contrast darker scenes with bright suddemtransitions creating optical illusions. Even at the pool here at the hotel we're staying at the reflections are just yellow-y sun highlights to the naked eye.
Edit: Finding Dory (Finding Nemo sequel) was on Free Form tonight, and throughout it, the only scene I noticed refracted caustics was the touch tide pool (where kids can touch sea critters) where they showed the water full of lifted silt and sand from kids stirring it up, there they had multiple colours in the refractions, but not in the rest of the movie from what I noticed. Especially in the ocean showing any sort of depth.