I just found a chiton on a shell in my tank when I was gluing down my new mushroom (one I lost, Thanks to CAMAKAZY for replacement) last night to a shell. I don't mind them, they can eat all the coraline they want, I got those long spine urchins from Cheng, thinking they would eat more, but not eating enough.... Coraline is growing back as fast as they are eating it... It's spreading like wild fire.... Ever since I fixed all the broken parts in this tank, coraline went crazy.... You mainly see the chitons on the side glass going into the sandbed, that's where I normally see them....