Ring Tail Tang

Snapshot: This majesty has a striking bluish-grey hue adorned with yellow-brown spots. Its crowned by a distinctive white ring at the base of its tail.
 
Other tidbits: Can grow up to 18cm or so. Native to the East Indian Ocean, West Indian Ocean, Australia, Japan and Indonesia. Watch as its colors dance, depending on its mood, from deep black to sun-kissed brown, accented with vibrant hues of orange and yellow.
 
Bare bones must know: Live-rock fish-only system, or reef aquarium with plenty of live rock.