Some sort of eggs?


Reefing newb
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