I had one of those for awhile, I finally got his butt. His favorite were zoos, but only expensive ones. He left the brown polyps I got for free on a rock. My advice do what I did, feed him to a trigger. It didn't bring back mt zoos but I did feel better. FWIW, I hunted mine for 6 months then I found RC and found a great way to catch them. A guy wrote this in a post sometime back. If you lay a tall waterglass with the top against a rock at a 45 degree angle and put food on the bottom, he well go in after the food and can't climb back out. Fortunately I don't have any more of them so I have not tested this, but it makes sense.