What could these be?

[copper]

The bright white dots on the center rock? Snail eggs maybe?

 

[bct15]

This look like nerite snail eggs to me...I have them everywhere. You might want to do a google search to confirm.

 

[macclellan]

yeah, nerite eggs

 

[copper]

yeah, nerite eggs

Makes sense, since I just added 20 Nerites to the tank.

 

[EvilMel]

hah hah...yeah. I'd say so.

 

[macclellan]

at least the eggs blend in on live rock! nerites are a nightmare in freshwater. those calcareous eggs stand out on plant leaves and driftwood and last for months. i gave up on nerites for just that reason