Can you help figure out what this is

[J2thefree]

I have these little clam/muscle looking things in my tank can you tell me what they are and if they are bad

 

[mr_X]

Stomatella snail. They are good.

 

[J2thefree]

Really a snail?!?!? I guess I'll throw them back in then thanks

 

[mr_X]

It looks like one in most pics. check here and see if it matches up-
Indo Pacific Snails

 

[J2thefree]

I would say yea but it has a shell on both sides not saying your wrong cause you know a lot more then me cause I'm soo new to this but IMO I think it looks more like a clam

 

[mr_X]

Oh...well, then maybe it is. I'm just guessing from the pic. In the 3rd pic it looks like a mollusk. Maybe it's just the angle. See anything close in the link I posted?

 

[J2thefree]

If I had to pick out of that page I would deffff say stomatella snail