Joculator Angelfish

Snapshot: Also known as the Yellowhead Angelfish. This stunner has vibrant colors reminiscent of the Bicolor Angelfish. But it has a unique twist — a mesmerizing blue ring around its eyes and delicate electric blue accents along its dorsal and anal fins.
 
Other tidbits: Can grow up to 12cm or so. A rarely encountered gem hailing exclusively from the Eastern Indian Ocean around the Christmas Islands and Cocos-Keeling Islands.
 
Bare bones must know: Live-rock fish-only system, fish-only system, or reef aquarium with care.