Freshwater Limpets/abalones

[dizzied]

I've seen them listed on the snail sticky in this forum, but has anyone actually kept them?

 

[iSnail]

I have one in my cold tank that ventures out occasionally. Not sure if it has any mates but I never see more than one at a time It is very very small probably 1 or 2 mm in diameter. There used to be more but I'm sure I must have taken them out during tank maintenance