Snail ID? Fuzzy domed shell with fissure?

[summer57]

I was surprised to see this snail on the tank wall, and have seen them only a couple of times. There are two & come out late at night - well after the lights are out. If I shine a flashlight on them -- such when I took these pix -- they move away very fast. I've had this tank for a few months, but didn't notice them until a couple of weeks ago.

They're about the size of a quarter, a purple/brown domed fuzzy shell with a fissure or crack down the centre. At first, we thought they looked like baby abalone or maybe some kind of limpet, but can't find anything online.

Any ideas?? And I hope they're safe algae grazers!

14596

[shiftline]

Money cowrie

[summer57]

I have some money cowries, but they don't appear to look like this. The domed shell matches, but my money cowries are smooth, shiny, and white with a ring around the top and about half the size of these fellas. Thank you, though -- maybe it's a kind of cowrie? because yes, the shell shape is right.

[shiftline]

It's a white shiny she'll underneath when his skin layer retracts

[summer57]

Thank you! yes, that makes sense.