yeah, thats why I havent bought a mandarin for my 75 -- he's too efficient at scouring the live rock. Reminds me of those terminator flying saucers eyes are focused, maneuverable, quick darting, killer instinct I put a piece of maiden's hair live rock from my refuge into my main tank--- had featherdusters, red algae, maidan's hair, some zoas -- the neon took out 3 feather dusters in the first 1/2 hr and the emerald crabs ate everything else so now its a bare peice of rock after sitting full of life for 3 months in my refuge not too mention it cost me $30