I had a scribbled for a month or so. For the first few weeks, it mowed down all of the razor caulerpa I put it in there for-model citizen. After that, it turned on zoas (can't remember exactly, but somewhere around 6-8 colonies in two days), then a neon green pocillopora (watched it munch away at it), then my acans (lords, but didn't touch echinata's). It didn't touch Palythoa sp., though (button polyps were fine, go figure...). I had other tanks to pull one genus of coral from at a time as the scribbled decided to try something new. It didn't do sample bites, though. Once it set it eyes, it ate whatever it was completely unless I got to it first. Luckily, they sleep floating around the tank, so getting it out was the easiest fish catching I've done.