Pest breakout in FOWLER - ID?

[thecodingart]

Can anyone help identify this guy - it’s taken over my sump

 

[fishywishy]

I have these things too, they are a type of worm or something but i don't know exactly what they are. they haven’t caused any problems, they are just annoying and i don't know how to get rid of them.

 

[Ironwill723]

Looks like pineapple sponges. Harmless filter feeder.
https://www.reeflex.net/tiere/7235_Sycon_scaldiense.htm

 

[thecodingart]

Looks like pineapple sponges. Harmless.
https://www.reeflex.net/tiere/7235_Sycon_scaldiense.htm

I had a feeling they might be after plucking some out but wasn’t sure as they almost look snail/egg/worm like.

 

[Ironwill723]

Hard to tell from the pics. But they do like sumps and other cryptic zones in my experience.
https://www.reef2reef.com/threads/any-idea-what-this-is.1031013/

 

[ISpeakForTheSeas]

Yeah, those are pineapple sponges; they tend to boom then bust in population before going away on their own.