Another Tag along

[Gtojr]

I have another tagalong that I need help with.  Any clue to what this is (Clam? Oyster?) and is it safe to leave in?

[Ohmegg]

That's so cool!

 

[M. Tournesol]

Looking at this guide to differentiate clams, mussels and oyster I would say mussel. Bivalve are all reef safe. The difficulty is keeping them alive.

[LazyFish]

It is a definatly a muscle I have two in my pininsula tank mine are mottled brown and kind of blue green near the edge with new growth. I've had them for years...one started spewing eggs once. Free fish food. Mine grow prety slow started off pencil eraser size now about 2.5 inches long.

[Gtojr]

thanks for the replys!  I've had this particular rock in my rank for 6-9 months (It even survived the great tank killing disaster of 2021) but don't move it much.  This is the first time I've noticed it, but it may have been there for a long time-I'm not real observant unless I know what to look for.  Unfortunately it's not in a place that I can see it often (bottom of rock) but nice to know what it is and that its there!

 

[Ohmegg]

Bivalves tend to survive "great dying events". Such as the Permian mass extinction 😆