CUC snails bothering clam

I've had my 3" Crocea clam for about 4 months or so. It moved a lot at first but finally settled on a spot, attached to a clam hammock and seems to be doing well. My turbo and Trochus snails keep attaching to its shell where they proceed to nap for several hours before moving on. This has been going on as long as I've had the clam. I'm wondering what harm can they do to the clam? And is there anything I can do to keep them off the little guy.

 

They're algae grazers... harmless to clams.

 

As long as the clam is open and expanded consistently I would not be concerned.

 

What are your water parameters? can you provide a picture?

 

Just to be clear, the snails aren't attacking the clam or anything. They just like to stick to the shell and rest there like they would on live rock. I don't see them scraping algae, they seem to just be chilling. So far the clam seems fine with the arrangement, I was wondering if it's problematic to have them brush against the mantle.

 

It won't hurt your clam unless the snails keep him closed for days at a time where it can't absorb light. My squamosa will have hermits and snails eating everything off its shell without closing at all but my maxima hates things on its shell so I have to manually brush his shell every few months. Even then they caused no harm to the clam.

 

Thanks, I won't worry about it then.