I think it varies with strobes at least.
From my experience, most marine life seems to see and hate a bright video light in their face. Pretty much all the subjects i point one at visibly recoil or shy away (i dont do macro though).
With strobes its a little different, im fairly sure some types of marine life cant actually see the flash because its so fast and theres no reaction at all whereas others clearly do and do blink or recoil.
For example Cephalopods such as Octopus and Cuttlefish visibly blink and sometimes recoil when a strobe fires. Turtles also.
Whereas Triggerfish Lionfish, Parrotfish, Lobster and other reef fish seem to have no reaction what-so-ever.
Edit:- just noticed the year. I thought this thread was a few months old not a year and a few months!