Potential Hitchiker ID?

[Probiesmasher]

Just bought a monti frag and noticed it has a weird orange bumb on the back in addition to this venus fly trap looking shell. Post dip, nothing has moved, currently in QT but curious if anyone knows what these are on my frag and if I can remove them or let them be. Thanks! Also, say hi to my new Firefish

 

[T-J]

The bump could have been something on the rock that it's attached to. Whatever the small clam/bi-valve was is gone now. The shell is wide open, nothing inside.