Whitecheek Tang

Snapshot: It has a sleek black to purplish-blue body, that is complemented by a delicate white mark on the cheek. Perhaps the most striking feature is its vibrant yellow striping that runs along its body.
 
Other tidbits: Can grow up to 20cm or so. Native to the tropical waters of the Indo-Pacific region. 
 
Bare bones must know: Live-rock fish-only system, or reef aquarium with plenty of swimming room. Larger size aquarium needed.