coral worm ???????????

happy holidays to all, I have a worm in my reef tank maybe someone can help identify. It is a grayish green, no bristles it is wound up in a big ball looking to be if stretched out about 5 to 6 feet long. but is very skinny, should I remove or leave in the coral, right now it is wound up in a big blob and not inside of the coral. It came out and is very close to one of the water outputs. What do you think it is and should it be removed ?

 

5 to 6 feet long?that sounds like a snake lol.anything that big should be removed.probably eat everything it sees.

 

Any chance of a picture? Hard to make a guess...sorry!