blenny or goby
Not sure which this is but he was a different fish for me... and so camouflaged it's tough to see him if you don't look closely.
Edit: Nope, not a goby or a blenny!
thanks Barbol for the ID:
Paracirrhites forsteri (not blenny nor goby) Blackside hawkfish
Snorkeling Molokini Crater
May 24th, 2012