This is the grey (or gray) angelfish, Pomacanthus arcuatus,....which is differentiable from the full grown French Angelfish (Pomacanthus paru) by virtue of being...er.... greyer. This is actually the intermediate phase. Like the French angel this species changes from a stunning juvenile colour scheme to a slightly more dignified adult phase. The faint white band you can see is the remnants of that juvenile phase.
a periclemenes shrimp. It's sat cleaning the angel's belly/chin directly below his pectoral fins (the ones on his side).
In the second photo a sharknose goby, Gobiosoma evelynae, is cleaning just above his eye. Its the stripey black/blue/yellow cigar looking thing.