Ques. Help Identify

[anthony91990]

I found this worm attached to my turbo snail early morning, what kind if worm is this and how bad for my system is it? Not sure if this snail was already on its way out or preyed upon

 

[BiGGiePauls33]

Looks like a bristle worm. Have a look here:
CREATURE CATEGORY | Melev's Reef CREATURE CATEGORY | Melev's Reef