Polychaeta-fauna associated to Caulerpa racemosa var. Peltata y C. sertularioides collected from Laguna La Restinga inner two zones was characterized and analyzed. Twelve families and 25 species were identified; Serpulidae was the family most abundant with two species Hydroides elegans and Pileolaria militaris (67.23% total abundance); whereas Syllidae and Sabellidae families showed the most richness with 5 (27%) and 3 (11%) species respectively. Caulerpa racemosa var. peltata had the highest abundance of polychaetes (74.15%) while Zone 1 had the highest abundance of polychaetes (56.67%).
