Snail parasite or harmless?

[Bret Brinkmann]

Sorry for the blurry pic. I can get a better one tomorrow. What is the brown lump on this snail? Just got this little guy and he came in with it on his shell. I thought it was a sponge at first but it's hard like a shell. Feels just like a snail shell too. It looks like the lump's shell is growing with the snail's shell as it fits the surface perfectly even over the surface texture. I also just noticed that it lifts up off the snail shell slightly and I can see some kind of soft body like it's a limpet or something. I tried looking up snail parasites but it only turned up parasitic snails. Is this a harmless hitchhiker or does it need to be removed?

 

[4FordFamily]

#reefsquad

I don’t have a clue that’s odd!

 

[saltyfilmfolks]

Pretty cool. Will need the better pic when you can. But could be sponge or another type of snail or limpit.

 

[Maritimer]

For some reason, I think that might be a slipper shell of some sort...

They're pretty harmless.

~Bruce

 

[Bret Brinkmann]

Here is the best picture I can get. Going to look up slippers.

 

[saltyfilmfolks]

That's so cool. I want !!!

It's that or a bivalve.

 

[Bret Brinkmann]

Looks like some kind of slipper but I can't find the exact type. Didn't see anything online about them being predatory just filter feeders. They will attach to a anything and stay there indefinitely. Thanks for the help everyone. This slipper should do well in my tank. I have lots of filter feeders doing well.

 

[Maritimer]

That's a pretty cool slipper!

Not one I've ever seen before, but I've mostly seen the local ones here in CT.

~Bruce