Translucent Critter?

[Jimjam]

Can anyone ID this thing? I’m assuming it’s a pest. Closest thing I could find is a limpet, not not exactly a match. Look an about 7:00 from the bottom of my Rock Flower. Any ideas? Keep or try to eradicate? Thank you.

 

[Reefing102]

Looks like a scallop best I can tell. Almost like a flame but without the red center

 

[Soren]

Does it close up if touched? Can you see any shell?
It looks to me like some type of scallop embedded in the rock.

Edit: If it is a scallop, it is probably considered a harmless filter feeder.

 

[Jimjam]

It does close like a clam or scallop. Looks to have a shell. Curious how he got in there, but he must of been in there awhile. Thanks for your responses