The Dwarf Lion and Fu Man Chu do stay relatively small but again their demeanor is pretty much the same. If you don't have ornamental shrimp in your reef tanks then a small Lion could be added to a reef tank. Again they have large mouths and deficate alot causing depreciation in water quality. Thorough skimming and water changes will need to be adhered to for maximum water quality and success of your tank and livestock.
Oh yes, remember they are venomous as are Scorpionfish, Toadfish, Wraspfish and should be respected when working inside your tank. Be AWARE of where these fish are in regards to your hands!!!!! _________ 125gal.w/Mag9.5 return(dual megaflow)>Mag7 pump Aqua Cev180skimmer.Wave2k Hamilton Reefstar(2)250watthqi(mh)pend.a Yellow, Naso Tang Red Lip Blenny Percula Clown Demoiselles Niger Trigger F. Wrasses Ceriantharia Orn.Shrimp and Stars Hermits Queen Conch asst. snails> Stars Zoos shrooms Montipora Brains Gorgonians Favia Turbinaria(large+small polyp) Acropora Xenia Tridacna (CroceaMaximaSquamosa) Leathers <35+75gal.reef tank as well> 
"IF THE PHONE DOESN'T RING...IT'S ME"  jb  |