Tiny clam id

[MaineSalt]

I bought my first piece of coral yesterday and when I got it home I found a bunch of clams under the coral piece. Any ideas? I'm sure they are to young to tell but I thought I'd ask. They move around a lot at night and tend to go to dark places.

 

[ohio reefer]

I bought my first piece of coral yesterday and when I got it home I found a bunch of clams under the coral piece. Any ideas? I'm sure they are to young to tell but I thought I'd ask. They move around a lot at night and tend to go to dark places.

They're muscles. I have them in my tank.