Any Underwater Photographers Here On TPF?

[Nwcid]

Thanks @Nwcid ! I will keep that in mind.

There's something that I'm not able to find an answer to though. My YS03 works on TTL via an optical fiber. I understand that means my internal flash has to fire for my strobe to work.
Here's the question, does the power of the internal flash decide the power of the strobe?

Or is it that I can just keep the internal flash as a fill flash to save battery consumption, and my strobe will work with the same power in each shot?

Sorry, I can not help with that. I am running direct wire that goes from my hot shoe to the strobe. My strobes are YS-250's and they have a power dial on the back. I am able to adjust 12 settings from full power to minimal.

Another trick would be to point your strobe further way from you subject to "reduce power".

I am shooting in full manual with mine.