small clam attached to my acros

[Billy P]

I have a 55g 2 acros 1 has only been in the tank for a few day and it has a small clam on it that wasn't there before. it also has a small white crab as well. are either of these harmful.

 

[North Bay 101]

Neither one will bother your coral. The clam is a small white one? The crab is a good thing. They are fun to watch.

 

[cutsupremetrib]

i would post a pic its hard to tell what kind of crab you have or clam for that matter