Clam, snail, something else?

[madhatter208]

Ok this thing is very much nocturnal and very slow moveing.
It open up like a clam n a little white thing pokes out n about.
I tried to find him on the links provided but nothing looked like this.
I was unable to get a pic of it opend. and it has sinced moved to some place I am unable to see it.

its on the flat rock and looks almost like a pistachio nut.

 

[Fluff]

Looks/sounds like a clam, perhaps a turkeywing clam which are pretty common and very hardy.

 

[Ziggy953]

I have a few of those in my tank also....

 

[chase33]

I have a few also and every now and then discover more. Don't know where they come/came from. The shells are emptied within days of my noticing them so they must be a tasty delight to some fish/ crabs, or snails.

 

[ellisz]

I dont think turkey wing clams will move though. Might open up a bit but their foot so to speak is part of the rock and the clam mouth is facing the rock. I used to get these on FL LR. Never lated very long though. A few would go long term but not many. I had a nasty cycle due to LR that was covered in these things and then thy all died off!