Endemic in the Mediterranean Sea (Serena 2005). Moderately common throughout the Mediterranean Sea, particularly in the western (Morocco, Spain and France) and western central areas (Tyrrhenia, Corsica, Sardinia and Sicily) (Baino et al. 2001, Ragonese et al. 2003, Florio et al. 2003, Follesa et al. 2003, Spedicato et al. 2003, Serena 2005, Mancusi et al. 2005), rare in Adriatic and Ionian Seas (Notarbartolo di Sciara and Bianchi 1998), common along northern African coasts (Stehmann and Burkel 1984) and eastern Algerian coasts (Bertozzi et al. 2003).