This investigation was carried out on the beaches Nombre de Dios, Viento Frio, and Palenque, which are in the District of Santa Isabel, Costa Arriba of the Province of Colón. The samples were collected manually, then placed in labeled plastic containers. to be transferred to the laboratory of the School of Biology of the Regional University Center of Colon where they were cleaned and then characterized, at the species level In addition to an analysis of variance, and diversity indexes were calculated as Williams alpha, dominance such as the Berger-Parker or the Margaleff, it was found that there was no significant abundance difference (F = 0.5984; p> 0.5552) between the beaches. Diversity indices indicated that there was great equity in the distribution of species on the beaches, with Viento Frio being the most equitable with 6.92; dominance was low, the highest value was obtained in Cold Wind, with 0.33. For Margaleff's index, the highest value was in Nombre de Dios to 18,863. We collected 134 individuals belonging to 28 species, 20 genera, of which the most abundant species was Littorina ziczac (Gmelin, 1791), with 24 individuals, both Nerita versicolor (Gmelin, 1791) with 19, and Nerita tesellata (Gmelin, 1791). ) with 12, while Certhiopsis greeni (CB Adams, 1838) with 15. Also 13 species were reported with a single individual: Arene variabilis (Dall, 1889), Batillaria minima (Gmelin, 1791), Cerithium atratum (Born, 1778) , Cymatium parthemopeum (von Salis, 1793), Leurosyrinx verrillii (Dall, 1881), Mitra barbadensis (Gmelin, 1791), Ocenebra muricoides (C. Adams, 1845), Polynices hepaticus (Röding, 1869), Purpura patula (Linnaeaus, 1758), Tachypollia didyma (Schwengel, 1943), Terebra cinerea Born, 1778 and Turbinella angulata (Lightfoot, 1786).