I already have a Pom Pom Crab in my 46gal bowfront, but I would also like to get a Porcelain Crab as well for the same tank. Would they get along or no?
They should be fine together, the porcelain crab has bigger claws but the pom pom packs quite a sting that are usually left alone. Some decapods like coral banded shrimp on the other hand would concern me more, that might attack either, like they often do to shrimp.
Late reply but yes absolutely they can be kept together, I have both with no issue. When they first met the Porcelain crab shooed the Pom Pom away with his big claws. Now the Pom Pom crab tends to avoid the area where the Porcelain crab likes to hang out (I have Petrolisthes galathinus and not the species that associate with anemones).