Spiny Pest. Please ID

[Tanggy]

Hi. I found this at the base of my SPS. Please help me ID it. Thanks.

 

[Gtinnel]

It kinda looks like a section of a bristleworm.

 

[Tanggy]

The SPS was responding to it by producing filmy strings.

 

[Gtinnel]

Many corals will produce a slime as a form of protection (or at least I’ve always assumed that’s the reason) when they’re disturbed. I’m guessing the corals slime was the strings you were seeing.