Can you help me identify this please

[huthain]

Found a bunch of these im my sump exclusively in the first chamber which consist of roller and skimmer. Not sure where it came from or what they are, friend or fo... but they seem to be a lot of them and theyre completely white.

Not referring to the spirobid worms but the larger pieces. Any help is appreciated.

 

[sixty_reefer]

Pineapple sponges they good to have

 

[huthain]

Pineapple sponges they good to have

Ahhhh thank god!! Its been a horrible battle of GHA, sea lettuce, dgitate hydroid.... I was really worried this was one more pain in the butt! Glad too know im getting some of the good guys too. Was worried it was some sort of nudibranch