Some sort of bivalve?

[tur4k]

What is this thing wedged under my montipora capricornus? It's just to the left of the snail. Some sort of bivalve? Also, is that an aiptasia just below the snail? It doesn't look like the other aiptasia and majano that I've encountered in my tank.

 

[saxman]

Yeppers...it's indeed a small bivalve of some type. We've had a few show up over the years.
As for the polyp, it's hard to tell from the pic, it could be an appy, but it could also be a zooanthid. Can you get a better pic of it?

 

[tur4k]

I tried to take a better picture of it, but my camera is 10 years and my photography skills are limited. It is very very tiny. I guess I should just nuke it with some Joe's Juice to be on the safe side.