But there are some BIG differences that can really mess up your pictures. Get rid of the water between you and your subject. In the water, you want to do the opposite. Get in close to the subject and, when practical, use a wide angle lens. This eliminates most of the water between the lens and your subject.
Red light is absorbed by sea water.
So the closer you can get your strobes and lens to the subject, the truer the color. Getting close also means fewer particles suspended between the lens and the picture subject. So even if you can't see 'em, the particles are there, and they'll dull your picture. In the pea soup of algae where Quail Creek enters the reservoir, visibility is down to four feet. The photographer's goal is to eliminate a most of the algae between the lens and the fish.