What the chuff is this?

[craigcolbert]

Found two of these this morning. Think they were mating currently have them in a separate tub in the tank waiting to see if they can stay or not... I have had a couple of Snails randomly die could this be the answer? I do have a video but don't think I can up load them here

 

[Mike J.]

Really can't make it out from your picture, but could it be a Stomatella Snail?
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