Hitchhikers on my hermit crabs

[kenandmoose2]

I have some hitchhikers on my hermit crabs. Im not sure what they are and just want to make sure that they aren't something I need to remove. they have a hard shell and have the shape of a half of a chicken egg. I will try to post a pic or 2. Has anyone seen these before and should I just leave them

 

[Betta132]

Do they move?
Can you get a better pic of a bigger one?
I'm thinking maybe some sort of barnacle... Do they have holes in them anywhere?

 

[kenandmoose2]

I will try to get a better picture. They do move but only a little and very slow when they do. The one in the top picture is the largest one. There are no holes in them. And I dont see them on anything other than the hermits.

 

[kenandmoose2]

I pulled this one off of the hermit crab today. It looks like some kind of snail or something .it dosent appear to be affecting the hermit so I put them both back in the tank I guess ill just see what happens with them

 

[Betta132]

I pulled this one off of the hermit crab today. It looks like some kind of snail or something .it dosent appear to be affecting the hermit so I put them both back in the tank I guess ill just see what happens with them

I suggest you just leave 'em. Sounds about right, they don't seem to be anything dangerous.
The lump on that one is odd. Could it be another snail?

 

[kenandmoose2]

It appears to be some kind of snail when I removed it. I left the rest of them. I guess well see