Like Allivymar, I wouldn't say that I dislike any particular fish. But the last time I was in this saltwater shop, they had a dogface puffer (dogfish? dogface? can't quite remember) in a big tank all by himself. His "skin" was very pretty -- purple with darker purple spot-type markings, but those teeth! I know it's not really teeth, it's a bone structure, but I don't think I could handle that in my living room! I flip-flopped back and forth...neat looking? Ugly? and I think I finally settled on ugly!