My Rod's Onyx host a Cherry Corals Yellow Torch. Sometimes the female kicks the male out though and then he hosts a purple duncan. Back before i erradicated all of the GSP in my tank the male hosted it. He would lay down in the GSP on his side and just lay there for minutes at a time motionless and the first time i saw him do it i thought he was dead. It was just about the coolest thing ever to watch him sleep in it like a human sleeps in a bed.
I have a pair of true percs and I was hoping that they would host in my frogspawn. So far they have been in my 300g tank for about 8 months and won't go near it.