Lineus ruber is a species of nemertine worm. It is found along the north Atlantic ocean, in the littoral zone of the coasts.
Gibson, R. (2005). Lineus ruber (Müller, 1774). In: Norenburg, J.; Gibson, R. (2016). World Nemertea database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=122536 on 2016-06-29