Red Ruby Dragonet

Snapshot: These beauties stand out in any aquarium, with their mottled white spots and striking yellow fins against a backdrop of ruby red. 
 
Other tidbits: Can grow up to 7cm or so. Widely distributed throughout the tropical waters of the Indo-Pacific Ocean.
 
Bare bones must know: Live-rock fish only system, or reef aquarium with plenty of live rock and sand.