The diversity of macrozoobenthos in the mesolitoral zone of Puerto Malabrigo_x000D_ from April to September 2014 was investigated. The samples were collected_x000D_ monthly in three study areas {A, B and C) using a square of 0.25 m2_x000D_ • The species_x000D_ were identified using taxonomic keys of marine invertebrates. Were recorded_x000D_ species of Polyplacophoros, Gastropodos, Bivalvos, Lingularios, Anthozoos,_x000D_ Malacostracas, Maxillipodos, Polychaetos, Asteroideos, Echinoideos and_x000D_ Ophiuroideos. The diversity of macrozoobenthos was 2.45 nits/ind, with a_x000D_ richness of 52 species.