worm on new indo milli id please

[maxwell]

Hi , I have just received a new indo milli import last week and it started to strip on one side i dipped the coral on receipt as always so i removed the coral and mansged to break all the stripping parts of to the base rock and found this critter at the bottom its not a bristle and it swims like an eel motion . Any id what it is .thanks

 

[Reefer40b]

BRISTEL WORM

 

[ajhudson15]

yea looks like every bristle worm I have seen