Help identify white "bee hives"

[Thor2j]

New to reef tanks but not salt water fish. I have these white bee hive looking things popping up all over. Are they some type of sponge??

 

[JaimeAdams]

Kind of hard to tell from the pics, but look like they could be pineapple sponges which are perfectly fine.

 

[Lionfish Lair]

Yes, they are sponges.

 

[Diesel]

Sponges alright.
Good guys to have as they are filter feeders and if you have Angelfish they can eat of them.

 

[Lowell Lemon]

@Thor2j ,
How long has the tank been running with that rock?

 

[Thor2j]

@Thor2j ,
How long has the tank been running with that rock?

just over 6 weeks

 

[SNAKEMANVET]

Yep,pineapple sponges.Good to have.

 

[Anthony kolodziej]

my sump used to have at least a thousand of them . but now they are all gone ;0( ...... But ......... now I have big white sponges . among others in there . I keep my sump in the dark for just that purpose

 

[deerhunter06]

I have a few as well, was hoping my regal would eat them but no luck...

 

[NanaReefer]

They will slowly die out as your tank matures. Until then let them do what they do best, filter your water [emoji2]