What is this? Eggs? Pest?

[zeroinverse]

What are these?

 

[smtank]

They are Nerite Snail eggs.

 

[zeroinverse]

Thanks!
I just got nerite snails last week and have never seen those eggs before. Because I never had nerite before.

 

[Reef Bass]

Cool. They're different from the Cerith egg clusters I've seen. Are each of those an egg or are those blobs each a cluster?

Here's an egg deposit on an ORA frag plug from a Cerith I had which clearly had some sort of OCD issue...