Monti boring spionid worms? Living inside coral

iamgreg123

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Hello again helpful people! I have a pest living inside two different montipora frags. I believe they may be coral boring spionid worms, but it's hard to get a good look at them. All I can ever see are two white antennae and a tube.

At first, due to the tubes, I thought it was a vermatid snail. I have those too, but now I know this is something different...

On my "plutonium" montipora palawanensis, I tried to poke and stab into the critters home to destroy it on multiple occasions, but it always ended up living... and I did a lot of damage to my frag. I can see the tube it makes, which it rebuilt within 48 hours of me destroying it. This one's in my QT tank.
Critter 5.jpg


Critter 6.jpg


I have also seen a few pairs of antennae on a "starburst" montipora capricornis in my display tank... This coral looks pretty nice otherwise!
Critter ID 3.jpg

Critter ID 4.jpg


Are these indeed the coral boring spionid worms??
What should I do about them?

Thanks!!
 

ISpeakForTheSeas

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Yeah, those are coral-boring spionid worms:
If they’re inside the coral, then they’re Coral-boring Spionid Worms:
 

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