Dr Roy will possibly chime in, but I would suggest a lot of branching liverock, as he said that they live in that environment. I had a variety of rock in mine. She (Baba-Yaga) was extremely aggressive, and they are known for 'defending' their territory. A tank of at least 20 gallons, they get prett big. larger if you can They hit pretty hard, as well.
Mine attacked whatever entered the tank, feeding tongs, the magnetic cleaner, an anemone that I tried to introduce.She was very active and roamed about quite a lot. She also rearranged a lot, so I would only add corals that were on a large (sturdy) rock. they can take a bit of light, so you could do a nice coral garden for him/her.
BTW, if the antennal scal;es (the rudder on the sides of it's head) is blue, it's a male, orange or yellow, a female.
Mine peferred fiddlers, then snails, then thawed seafood. She also liked ghost shrimp, though she never chased the few guppies that i occassionally offered.
-Uriel
