Ark Clam Hitchhiker?

[Lafoo]

I removed one of the LR that had some questionable things growing on and it last night and this morning I found this little guy nestled on top of where the removed LR was.
Is it an Ark clam? It certainly has those lines running along it..but I don't know much about clams. Any info guys?

 

[Lafoo]

Here's a closer pic...

 

[Lafoo]

Nobody knows? :(

 

[Bifferwine]

I don't know what kind of clam it is either, sorry. But it's not harmful.

 

[ZyberGoby]

I have then in various sizes all over every last live rock I have. I think they are just fine regardless they are water sifters. So I leave them I think of it as extra filtration :D

 

[dcantucson]

It looks like what Saltwaterfish.com sells as "Cleaner Clams" to me.

 

[Piratefish]

I have two about the size of a nickle on my rocks. I thought they were just shells but yesterday I saw them open and poked one and it snapped shut. I think they are harmless.

 

[fastrd400]

Looks like a "Chowder Calm", cook it :mrgreen:

 

[Lafoo]

Thanks guys! Yeah..he's not doing much but just chillin and mindin' his own. I think I will call him Chowder. :)