I've had one in the family (was my brother's). They are very hardy, but once you add one you can take that beautiful long list of fish you can add to your aquarium and throw it away. We kept him with an eel so we had no issues, but anything he can fit into his mouth (or thinks he can fit into his mouth) will be gone. You will only be able to keep larger aggressive fish with him (snappers, triggers, non-reef safe wrasses, lionfish, etc.).
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55gal,216 watt Tek T5, 45#LR, 45#LS, 3 maxi-jet 900's on a natural wavemaker timer,phosban reactor, 5 gal fuge (built out of standard 10 gallon tank) with chaeto and feather caulerpa, sealife systems protein skimmer, wet/dry, 3 blue/green chromi, 1 skunk cleaner shrimp, 1 coral beauty,1 scopas tang, 2 false percs, 5 mexican turbo snails, assorted dwarf blue leg hermits, astrea snails, and nerite snails | 
miniatus grouper 
