First one I believe is a common squirrelfish but maybe clearfin squirrelfish? Doesn't appear to have the yellow of the common.
Second one seems like it should be easy but I can't find anything that seems a dead on match.
Third one has me totally stumped. Not the best picture but it is White with horizontal black stripe down the side. Probably 5"-6" total length. Saw a few of them but never got a good shot.
All of these are off the coast of New Providence Island in the Bahamas in 40-60 ft.
Any help is appreciated as I'm getting bleary eyed searching the net for these!