False Personifer Angelfish

Snapshot: Also dubbed the Bluemask Angelfish, this beauty sports a striking, almost black body. Its face has a mesmerizing blue-green hue, with males showcasing a speckled yellow visage. A splash of yellow adorns its forehead.
 
Other tidbits: Can grow up to 36cm or so. Native to the tropical waters of the West Pacific Ocean, including around Australia. The transform from female to male as they mature into aquatic royalty.
 
Bare bones must know: Live-rock fish only, fish-only or reef aquarium with care. Plenty of live rock.