Are they the same crabs who carry around pieces of anenomes on their claws? Any one have a PC? Tell me about them please? Will they get along with clown fish? Is a pair a good idea?
I think you may be thinking of the decorator crab, who steals coral peices and adorns his shell. They are different than the porcelains.
I haven't had a porcelain, but I'm sure someone will be along..
Porcelain Crabs are the very flat filter feeding crabs with oversized claws (harmless).
A few types will live in the larger Anemone. They are perfectly compatible with most Clownfish. Maroons and Saddlebacks may evict them from an anemone though.