Some sort of eggs?

[Treezer8]

I really have no idea on this one..

What do you guys think these are? And no, they're not sand lol. My sand is a lot bigger and isn't perfectly round/oval like these. My camera isn't that good, but they look likes eggs when I look close at them
And as for the bivalve thing, I put up an identification thread up a while back and no one could figure it out, so I'm still curious.

If you can't see them, they're to the right of those zoas

 

[grozier]

You dont have a urchin in there do you? Mine makes these weird little balls, I think it's his poop?

 

[Treezer8]

Yep, I've got 2 urchins. That would make sense, he was nearby

 

[grozier]

Could be it then. The balls will cone from the top of them I guess when they are eating