Foxface

Snapshot: This majesty has a striking thick-striped head adorned in black and white hues. Its predominantly yellow body is interrupted only by a dramatic black spot near its dorsal fin.
 
Other tidbits: Can grow up to 20cm or so. Restricted to the north-western Pacific, specifically between Japan and the Philippines.
 
Bare bones must know: Live-rock fish-only system, or reef aquarium with care. Wear gloves when handling, their venomous spines can inflict painful injuries.