weird invert on crab shells

[adidas]

on my orange hermit crabs shell are a couple cone like shaped hitch hikers on it, they don't seem to move, but i've seen like little tentacles come out from under it. any ideas what they are?

[Scavenger]

Sound like barnacles to me.

[adidas]

Sound like barnacles to me.

i looked those up, and they all look nothing like them baarnacles i saw have openings on top, these don't. :confused:

[outtafocus]

I believe it is a slipper snail. I tried to find some good pictures of one but this was the best I could get.
http://www.wildsingapore.com/chekjawa/largfoto/i020bx.htm

I have one, on one of my astrea snails. The link says they are white, but mine is covered in coraline.

[Old Guy]

Limpets maybe :question:

[adidas]

I believe it is a slipper snail. I tried to find some good pictures of one but this was the best I could get.
http://www.wildsingapore.com/chekjawa/largfoto/i020bx.htm

I have one, on one of my astrea snails. The link says they are white, but mine is covered in coraline.

not those hmmmm...

[adidas]

Limpets maybe :question:

look em up, thats what they are!! thanks..now i know what they are :cool:

[TNTCanada]

http://img.photobucket.com/albums/v79/TNTCanada/Aquariume/Snails/Aquarium_2004_037copy.jpg

Are these what you are talking about

[adidas]

mine arent covered in coraline. They are limpets though :)