Eggs? ID please

[Jo'Reefer]

I found these on a frag plug.. hoping for an ID to keep or remove if needed. Figured I would ask the pros. Cheers, Happy Reefing all.

 

[TheScientificReefer]

How old is your tank? seems like it could be sponge?

 

[Jo'Reefer]

Thank you for the reply.. my tank is almost 2 years old nothing else out of the ordinary.. aside from that, I added these frags last week all were clean and freshly dipped.. I only found these on one out of 5 on the rack.. I also just added some additional CUC a day or two after, which there are a few new species to me so was hoping and figured it could be eggs from them. My original CUC reproduce all the time I just added some variety to the crew. To me it appears as tho there are small embryos (white/opaque dots) inside of a clear sack which is stuck to the side of the frag in a few small clusters.

Another fear would be flatworm eggs which I have not yet encountered (knock on wood)