Sump Growers. ID Please? Good/Bad?

[Haubfather07]

Hi all! First 6 month cleaning of the sump. I have a ton of the attached ‘things’ growing in my sump. I’d like to clean and make it look pretty again. Should I clean them all out? Are they good/bad? Leave them. Advice please and thank you in advance!!

 

[KrisReef]

1st pic I see a tunicate, good filter feeder.
The other pics, Im not certain what those long bifurcated white strings are?

 

[Haubfather07]

1st pic I see a tunicate, good filter feeder.
The other pics, Im not certain what those long bifurcated white strings are?

Most of them are the same or starting to grow into those same things... I THINK.

 

[Eastlake]

Look like pineapple sponges. They're harmless and beneficial filter feeders

 

[DSC reef]

You can suck out the detritus but the life in the sump is beneficial.