egg sac question

[NanoAmyDee]

I am sorry I don't have a picture. They are way too small to take a pic. I have approx 20 of these sacs attached to the glass. They are oval shaped, clear, and about 9 or 10 small white dots/eggs inside. They are attached to the glass on one end.

 

Any idea what is laying eggs in my tank? I have 10 nass, 5 astrea, 1 turbo, blood shrimp, bi color blenny, cinnamon clown, various corals and a sebae.

 

These sacs are about the size of a pencil point. Really small and hard to see.

 

Let me know what you think.

 

Thanks!