“…Sabellariidae reefs and mounds are very widespread, being located along the temperate coastal sectors of all continents (see a complete and recent review in : Fournier, 2013). Sabellaria alveolata and Sabellaria spinulosa (Leukhart, 1849) are the most common species found along the northern European coasts as well as in the Mediterranean Sea: the former, S. alveolata, builds mainly intertidal and subtidal reefs, whereas the latter, S. spinulosa may be found only in subtidal environments as isolated tubes, short-lived crusts and, more rarely, as small reefs (Gruet, 1986;Holt et al, 1998;Nicoletti et al, 2001;Dubois et al, 2003Dubois et al, , 2006Delbono et al, 2003;Braithwaite et al, 2006;La Porta and Nicoletti, 2009). Previous studies have analyzed in detail many and various aspects regarding S. alveolata reefs: i.e.…”