Smalls, I have that pic in my Reef tank. No joke. It's a Mandarin Dragon. Very Hardy fish, probably the most exotic fish on the planet. Very hard to feed though, and it's very rare for them to live in a tank longer than a few months.
My aquarium has plenty of well developed live rock, from which it finds copepods and other crustaceons on which to feed upon.
Mines been with me for almost a year now, fat belly n all.
Although EXTREMELY rare, it is possible to get a mated pair, they will fuck each other a LOT, but the eggs are impossible to raise in the aquarium...now.
What? I like fish? What?