Hitchhiker clam ID help

[rwreef]

I bought 2x trochus snails. Both have these what appear to be clams hitchhiking on thier shells. Anyone have an ID on these?

 

[BostonReefer300]

I don't think those are clams. Maybe limpets? But they don't look much like limpets either in that picture anyway

 

[Reefing102]

Perfectly safe. I don’t have an ID but I believe they are primarily filter feeders

 

[rwreef]

I believe it's a clam or similar with a "mouth" that opens and closes. For sure a filter feeder and safe. More curious of the type. I will try to grab a better pic.

 

[rwreef]

Better pics...hopefully lol

 

[vetteguy53081]

Not clams but what is known as bivalves and very common hitchhikers and are members of scallop group and filter feeders

 

[rwreef]

Not clams but what is known as bivalves and very common hitchhikers and are members of scallop group and filter feeders

Great! I saw mention of bivalves and it had me wondering, thanks!