Anyone have any clue what these strange white disks are. They appeared overnight on my live rock.

[ccmcdaniel78]

Strange white disks appeared over night in a strange pattern on my rocks. Any clue what they are?

 

[exnisstech]

I'm not good with IDs but let see if @ISpeakForTheSeas can help out?

 

[ISpeakForTheSeas]

Strange white disks appeared over night in a strange pattern on my rocks. Any clue what they are?

Welcome to Reef2Reef!

Those are snail eggs - looks like Crown Conch or similar. What large snails do you have in your tank?