What are those spiky worms on my rocks?

[namlessdude]

I noticed these spiky worm on a live rock i bought from someone shutting down their tank. I never noticed these before but i turned up the light and noticed them.

What are they and are they safe?

 

[Steven Garland]

Bristleworms,an amazing member of the clean-up crew. Just don't touch it,it can put out a nasty sting.

Those little hairs are like glass. I got stuck once and it burns pretty good.

 

[VintageReefer]

Yes. Bristle worms. They are good at cleaning extra food and waste that make their way to the bottom of the tank of inside rock crevices.

They are harmless creatures but, those spines are defensive and sort of like fiberglass strands. They look soft but it’s not. They are sharp and flexible and will stick in your skin like a splinter. Just be careful around them and use forceps/tweezers if you ever need to handle one.

They generally hide in the daytime and you won’t even notice them. Might come out during a tank feeding but they will retract and hide shortly after. They will come out in the dark and clean while you sleep

 

[namlessdude]

Thank you both for the answer!! I guess i got lucky that i didnt get stabbed when i placed the rocks in the tank but ill definitely be more careful!