ID on Eggs?

[rooneyj889]

Hey all, just spotted this in my display refugium today. Looks like eggs of some sort but can't tell from what. Currently in the refugium are 2 Banggai Cardinals, some Astraea Snails, Nassarius Snails and Hermits. Any ideas?

 

[Soren]

They do not look like Nassarius snail eggs (I've seen the same in my tank that has some Nassarius snails), but I am not sure about the other possibilities.