ID Please

[Saintgoodness]

Any idea what this is? Tank has been going for about 1 month. Recently finished cycling and added 2 small clown fish. I have not turned the lights on yet. Thanks

 

[SHNICI]

Look like a sponges, but for 1 month, if they don't drop from the LR (if you got it ready) don't see way they to grow that big for less than month

 

[P-Dub]

Very difficult to tell with any degree of certainty from the photos. It could, as well, be bacteria.