Never seen these. Friend or foe?

[mnreefster]

Hey all got these Hammer corals from a friend but never noticed these little things before on anything. Looking for some info on them or identification. Thanks! Last pic just for size reference.

 

[ISpeakForTheSeas]

I'd go with foe - Coral Boring Spionid Worms:

Coral Boring Spionid Worms -- an ugly bane to SPS

This is not something I've ever seen before. They are extremely ugly. Mar the appearance of SPS. This is on a "Beach Bum" encrusting montipora. I would take aphasia or even montipora eating nudibranchs over this crap. I've beat those with hard work. Not sure how to eliminate these without...

www.reef2reef.com

 

[mnreefster]

Thank you. I was going to say they remind me of vermetid snails. I’m going to see if bumblebee snails I have do anything. Right now these are in qt as I just got them. My bb snails destroyed the vermet outbreak I had. Otherwise it is insulin syringe time, ugh.

 

[marcosnano]

Thank you. I was going to say they remind me of vermetid snails. I’m going to see if bumblebee snails I have do anything. Right now these are in qt as I just got them. My bb snails destroyed the vermet outbreak I had. Otherwise it is insulin syringe time, ugh.

just wondering, did you managed to get rid of them?