WTFudge is this?

[Pod Hunter]

It looks like a tooth, but all mine are intact! Never mind one but two of them!

 

[weezle]

Looks like a clam of some sorts

 

[459b]

Harmless, filter feeding bivalve mollusc. Good to have in your tank

 

[viper357]

Harmless, filter feeding bivalve mollusc. Good to have in your tank

 

[Pod Hunter]

Thanks