What are these?

[dylanlevesque711]

These worms appeared on my downpipes, can someone identify them?

 

[dvgyfresh]

Spirobid worms , harmless filter feeders and not an emergency lol please just ask a question without the emergency tag

 

[Cell]

I don't think he means the white curly spirorbids, but the longer ones sticking straight out. Hard to tell in the pics and out of water.

 

[NowGlazeIT]

Looks like a sponge from here. Do they move around?

 

[elysics]

Can you put it in water and take another picture?

 

[Cell]

As noted in the other thread, likely pineapple sponges.