Anything that falls into the tank. He's a comb-tooth blenny, so he has size limitations, but if he gets a sinking pellet, he'll play catch and toss with it as he gnaws bits off the edge. He eats: algae, detritus, Formula One Pellet, size medium preferred, as well as cyclopeeze, and has met frozen mysis but seems to like cyclopeeze better. This doesn't stop him from eating it. The only time he's ever touched a coral is to sleep in it, and once with a near totally rtn'd acro [a heat crisis while I was out of town], he cleaned off all the bad tissue and left the good. Rot seems to attract him, but to my knowledge he's not a carrion-eater.