Need help ID-ing please

[Koconnor15]

I got this rick free from my lfs. It has a few types of zoa, Kenya tree, at least 10+ feather dusters, some little muscles and this other thing I can’t ID. I’ve reverse Google searched it and asked in other groups. It has what looks like a tiny something inside it. It will retract when I shine a flashlight on it but the outer layer doesn’t move.
Attaching pictures below.
Thanks!!

 

[Timfish]

I'm just guessing but it looks like some kind of clam to me

 

[NowGlazeIT]

I'm just guessing but it looks like some kind of clam to me

Yea I’ve seen small ones like that while gathering oysters.

 

[Isopod80]

It's definitely a bivalve. Kinda looks like a little turkey wing. (Arca sp.) They're pretty common hitchikers.

 

[Sharkbait19]

Looks like a bivalve to me. I have something similar in my tank:

 

[Koconnor15]

It's definitely a bivalve. Kinda looks like a little turkey wing. (Arca sp.) They're pretty common hitchikers.

Are they good or bad?

 

[Koconnor15]

Looks like a bivalve to me. I have something similar in my tank:

Does it hurt any corals close to it or irritate them?

 

[vetteguy53081]

Bivalves are not long lived. They are relayed to scallop family and are filter feeders. No special requirements

 

[Isopod80]

Should just act as a harmless filter feeder. They often don't survive very long in most people's tanks. Unless of course you dose phyto.

 

[Koconnor15]

I'm just guessing but it looks like some kind of clam to me

That’s what I was thinking but couldn’t get a definitive answer so I didn’t want to throw it in my tank and find out a month from how it’s invasive or something

Bivalves are not long lived. They are relayed to scallop family and are filter feeders. No special requirements

thanks

Should just act as a harmless filter feeder. They often don't survive very long in most people's tanks. Unless of course you dose phyto.

I don’t. I dose AB+ but nothing else as far as foods for corals and filter feeders.
thanks for the help!!