Worm/centipede are they good or bad

[BCReefer]

I need to know if this long worm/centipede thing in my tank is bad or good?

I though we had a post here a few months ago, but I am unable to find it?

This worm/centipede is about 2.5 – 5 cm long orange and brown.

Should I get it out or is it good for the tank?

sorry can't post any pictures, my camera is not good enough.

Thanks
Patrick