Vagabond Butterflyfish

Snapshot: This butterflyfish flaunts a sleek whitish body. Its body is marked by intersecting dark diagonal lines, creating a striking chevron pattern. It has bold black bands slicing through its eye, plus an accentuating stripe on its caudal fin.
 
Other tidbits: Can grow up to 15cm or so. Distributed throughout the Red Sea through the Indian Ocean and past Indonesia into the Pacific. 
 
Bare bones must know: Live-rock fish-only system. Stable, top-notch water quality.