Clam, mollusk?

[tidefanjam]

Any idea what type of bivalve this is? Just kinda showed up couple days ago

 

[DSC reef]

Not to sure @saltyfilmfolks

 

[mtfish]

Shaped like a mussel, but they usually are attached to something hard with their byssal threads. Did it get knocked off a rock or did you just find it on the sand bed?

 

[tidefanjam]

I found it on the sand bed, I think it was on a rock I have that’s covered with zoas, I could see a small shell on it between zoas but it looked smaller, it’s possible one of my troublemaker crabs knocked it off

 

[saltyfilmfolks]

Mussel. Pretty cool ones too. They walk. I’ve found them at the top of the tank overnight

I have a few of them, yes.

 

[mtfish]

I never thought of mussels be mobile. Thanks for the post.