Max lenght: 3"
Eats meaty food
larger specimens may eat ornamental shrimp
Eats flatworms
Active species
Hardy if survives shipping
Does well in a community tank, but may behave aggresively towards less aggressive wrasses and other shy fish. (I've heard they attack firefish).
Like lots of hiding spots
Can be housed in groups if tank is big enough
Min tank 20 gallon
All this is from Marine Fishes by Scott Michael (except the firefish comment I learned on this board)
Hope that helps, they are a cool looking fish.