Yellow Pyramid Butterflyfish

Snapshot: With vibrant yellow fins and a predominantly white body, this fish rocks a striking triangle pattern that gives it its common name! The black head adds a cool touch, helping it blend seamlessly into its wild surroundings.
 
Other tidbits: Can grow up to 18cm or so. Distributed throughout the East Indian Ocean, Australia, Indonesia, East Pacific, and the Central/West Pacific Ocean. 
 
Bare bones must know: Live-rock fish-only system or reef aquarium with care.