Just noticed a new hitchhiker!

[seve1]

I think it is a cap snail. The body is almost whitish, almost clear with a small partial shell that looks like mother of pearl. Very cool and I went past it twice with the light before it caught my eye.

 

[Fluff]

sounds like a stomatella varia. A nice algae grazer.

 

[seve1]

Thanks Fluff, that is what I pegged it as after doing some research. Very unusual looking creature and somehow belends into the background even though the rock is much darker.