Good evening! I got a derasa clam in my sps tank on Saturday, looks good and healthy. Has been over a month at dealers tank and very responsive. I currently have no inverts other than corals on that tank. There is only 1 tiny acro crab on an acro far away from the clam but he never leaves his coral. I have a purple tang, a pajama cardinal, and a black saddleback clown fish. This a 90 gallon tank, with MH lighting. bare bottom So I placed the clam on a rock. My question is can I have any shrimp, starfish, things like that with the clam in there?? I only have those 3 fish, however right now there are not even in the tank, they are still in quarantine since I had an ich epidemic and had to treat with copper in hospital tank. What other fish can I have in there? I was thinking about adding a mandaring dragonet or a 6-line wrasse. Maybe a coral banded shrimp or a skunk cleaner shrimp? Any suggestions? I have heard there are gobbies that like to perch on clams, is this a relationship that is mutually beneficial or will it irritate the clam?? Thanks and sorry for all the questions. Tank parameters are favorable for sps.