They are lined up around one of my K1's... And they are starting to appear all over my rocks. Some of the ones on the rocks are tan colored instead of white....
I mean, they can be annoying. And I've never actually seen any of mine hatch, however looking with lights out last night I saw hundreds of baby snails, so maybe they are.
But yes, CUC spawning is generally a good thing. It means free CUC!