I researched a lot on the mandarine dragonet and figured with a 55gal tank, 80pnds of very live rock, and a full functioning Dsb, that a mandarine would survive in the tank, but 2 weeks later he died...I don't get it, usually I dont try to beat the odds with a fish but when I do, this happens...Its a shame that this is a popular fish but yet tends to starve in captivity...oh well, learned my lesson the hard way.