I have live rock that I ordered and it’s been in my tank with my fish for a while. The 2 clams in these photos have some stuff growing on them and I am trying to identify what they are. 1 clam is still alive and the other didn’t make it with the rock but we kept the shell.
1 has red stuff coming from it and the other is brown-almost looks like cup coral?
1 has red stuff coming from it and the other is brown-almost looks like cup coral?