This isn't my standard. This is the first time a clown trigger has seen a reef at my house. So far it hasn't bothered anything except the urchin, which I expected. I have mushrooms, polyps, leathers, gigas clam, anemones, and acropora in this tank. I'll see, I just have to wait and find out. I do feed them 2 times a day though to deter him from eating other things.