Scallop Hitchhikers?

I'm very new to the hobby (And new to 3reef, hello ) I started a 10g nano tank about a month ago. The live rock, live sand, and water came from a system that had been running for 6 years.

So as my first coral addition to the tank, I bought a cheap zoo frag from my LFS, just to make sure I could keep it alive before buying anything more expensive. I had noticed these guys on the rock when I was in the store, but didn't really think anything of it because they were closed, and I've never really seen a scallop before.

The rock has been in my tank for about a week now, and the little things on the rock have gradually been opening. Every once in a while I see one snap shut.

Does anyone know what type of scallop or clam or whatever these little guys are?

Are these going to be a problem for my tank? Should I remove the rock? If they're not bad, how do I go about keeping them? What do they eat, and what kind of water parameters do they like?

Sorry for the photos...it's the best my phone can do.

 

They are definitely a bivalve and are more than likely a clam. They aren't scallops though.

 

Okay, good to know, thank you.

I forgot to mention above, that they do have little hairs around their mouths. They look a bit like an underwater venus fly trap.

 

They're technically oysters, but they shouldn't be any problem. It may be hard to keep them alive long-term, though.

Cheers,



Don

 

Ah yes, I can see now their shell is wavy.