Bicolour Angelfish

Snapshot: Sporting a dazzling yellow front half and a bold blue back, this stunner also flaunts a striking vertical blue stripe from eye to crown. And let's not forget that radiant yellow tail! 
 
Other tidbits: Can grow up to 15cm or so. Native to a number of tropical reefs in the Indo-Pacific region, as far as Samoa.
 
Bare bones must know: Live-rock fish-only system, fish-only system, or reef aquarium with care.