Scott's Fairy Wrasse

Snapshot: Also known as the Black-fin or Blackedge Fairy Wrasse. Location makes a difference to its colouration. In Fiji, it's dubbed Scott's Greenback, boasting vibrant green hues punctuated by a bold black edge along its dorsal fin. Head to the Cook Islands, and you'll find a bluer beauty, flaunting yellow fins and sharper color contrasts. Meanwhile, down under in Australia, expect a touch more red in the fins, though with subtler transitions.
 
Other tidbits: Can grow up to 13cm or so. Native to the tropical waters of the South Pacific Ocean including Australia, the Cook Islands and Fiji. Just like us, their mood can influence their hues, adding an extra layer of intrigue.
 
Bare bones must know: Live-rock fish only, fish-only or reef aquarium.