Sudden apparition on my glass - What the heck is it??

[8Calvin8]

http://www.canreef.com/photopost/dat...m4-med.jpg?409

You gotta be **edited** me.
all this for just some Cerith snail eggs?

Wouldn't they have been eaten by now?

what can I expect form here then. Can I protect them?

For size reference, can you see the left-hand hermit approaching the glass? I also caught a bit of a medium sized mushroom behind the egg clutch.