Powder Brown Tang

Snapshot: Sporting a primarily brown body, it may shimmer with a grayish hue under tank lighting. An eye-catching orange strip adorns its dorsal fin.
 
Other tidbits: Can grow up to 20cm or so. Native to the tropical waters of the Indo-West Pacific region.  
 
Bare bones must know: Live-rock fish-only system, or reef aquarium with plenty of swimming room.