Sacks?

[Blakers]

I saw these little white sack looking things growing today and there's like 20 of them all over
Idk what they are, can anyone help me figure out what these are please
Thankss

 

[AquaRick]

Looks like pineapple sponge. Harmless filter feeders.

 

[Craigj247]

I agree with AquaRick... Def is pineapple sponge