Yeah spaghetti worm was what I concluded, but all the pictures showed them with pure white arms that were quite thick compared to mine (closer to spaghetti thickness, hence the name). I'm sure there's lots of variation within the species anyways. I did read that they are no harm to tanks, but I'd still love to know more about these creatures. I guess if it's no harm I won't try to get rid of it, but it's kind of creepy looking. Everytime I see it I kind of go "ewww, gross".
Thanks