Earmuff Wrasse

Snapshot: These beautiful wrasses have a captivating blue-green body, adorned with a touch of pinkish-purple along their lower sides and belly. What sets them apart is the bold, bluish-black blotch right behind their eye. 
 
Other tidbits: Can grow up to 25cm or so. Native to the tropical waters of the Indo-Pacific region including the Great Barrier Reef, the Coral Sea and Christmas Island.
 
Bare bones must know: Live-rock fish-only system, or reef aquarium. Thick, sandy substrate.