The problem with mandarins is their feeding habits, they are always perusing the rockwork for copepods and the like. If you can get one thats already weened to take frozen food such as Brineshrimp and Mysis then you stand a better chance of having the company of this fish for a considerable time. I would love to have a Mandarin but only having a small setup, there simply wouldn't be enough room to sucessfully keep one. I do have a smaller Dragonet namely a Scooter Blenny ( Synchiropus ocellatus) I know its smaller and not as highly coloured but they display the same charactaristics as their larger cousins. I got him when he was already taking frozen foods. I hatch brineshrimp on a daily basis which he really enjoys. So for anyone keeping Dragonets I suggest that you set up a provision to hatch brineshrimp regularly to increase their survival rates.
Regards
BigC