Clam type thing on elegance coral

[Impala67]

There’s this red clam thing on this coral I have no idea what it is or if it’s safe.

 

[blaxsun]

It's... red.

 

[bnord]

I think you nailed the description. It’s a clam like thing on an elegance

 

[ISpeakForTheSeas]

A cockle maybe? Definitely a bivalve- I don’t know any bivalves that aren’t reef safe, so I think you’re fine. Cool find!