Moorish Idol

Snapshot: Closely related to the Tang or Surgeonfish family, this fish boasts bold bands of black, white, and yellow, that create a striking contrast. With a small mouth and a sleek, elongated snout, it exudes unique charm.
 
Other tidbits: Can grow up to 23cm or so. Widely distributed throughout the tropical waters of the Indo-Pacific region. 
 
Bare bones must know: Live-rock fish-only system. Mature or well established aquarium with plenty of live rock. Expert aquarists only.