Bicolored Blenny is a awesome fish.
I bought one ONLY to control some algae, and it has quickly become my wife and son's favorite fish. They are out alot, have a great personality, and looks pretty cool, too. The females are a bit more colorful than the males.
Mine pops into whichever powerhead is off at the time and pokes his head out, pops out for a quick bite or three off the rock, then swims up and down, then back to the powerhead.
They swim almost eel-like and seem to be fairly hardy.
I would recommend one to anyone who asks just because of the personality - eatind hair algae is just a bonus.
"Okay brain - you don't like me and I don't like you, so lets just get through this and then I can continue killing you with alcohol" --Homer Jay Simpson