I had a acan and it was doing great , opened up really nice and beautiful looking! I looked at my tank yesterday morning and noticed my acan was all gone and just white with a tiny bit of color left in tiny specs. I thought it was bleached because I raised my light recently. Now I think something has been eating it because I had a hairy lavender mushroom and the same happened with it but I moved it and thought my light was burning it because it was so close to the water line. After moving the mushroom is when my acan got wrecked! I think I may have a bobbit worm hiding in my live rock that’s the archway in my tank. I haven’t been able to get a good picture or really see it but I’ll post the best ones I have been able to get