Long Finned Goby (Pair)

Snapshot: This goby has a soft grey body with five bold, blue-edged bars that stretch to its sides. It also has snazzy pink waves down its back.
 
Other tidbits: Can grow up to 18cm or so. Distributed throughout the East Indian Ocean, around Australia, Japan, Indonesia, East Pacific, New Zealand, Central/West Pacific.
 
Bare bones must know: Live-rock, fish-only system or reef aquarium. Thick, sandy substrate required. Thrives best when paired up (male and female, of course).