Permanent acoustic receiver network in the Cies Islands (National Park Illas Atlanticas of Galicia, NW Spain). The array was established as a result of a national project, TAC (Pleamar program, Fundación Biodiversidad, 2018), to evaluate the efficiency of the National Park as a marine protected area. This array was later increased during projects DESTAC e iGENTAC (pleamar 2019 and 2020). Currently, this fixed array is composed by 24 VEMCO (69 kHz) and 28 THELMA Biotel receivers (69 and 71 kHz) to monitor movement and behavior of relevant coastal species. The array is deployed in shallow waters (up to 20 meters) of the national park. This array represents the unique permanent acoustic network deployed in a marine protected area in NW Spain that provides annual records of movement patterns of different coastal fish species.