I think I'm most afraid of angels. I love them to death and I'm sure I'll end up grabbing one for my new tank, but I love my clams and zoas and the like and just don't want to try and catch a rebel angel in the display. If I happen apon a potters again though I can live with no clams. Only angel I was willing to take the risk with, unfortunately I lost it in qt after endless battles with various diseases from an unreliable source.