PELD-ILOC (Long Term Ecological Research of Brazilians Oceanic Islands) is a network of Brazilian scientists from several universities and organizations engaged in long-term ecological research of marine biodiversity on the four Brazilian oceanic islands. The network unites researchers to monitoring the marine wildlife all around the St. Peter and St. Paul’s Archipelago, Fernando de Noronha Archipelago, Rocas Atoll and Trindade Island and Martin Vaz Archipelago since 2013. Gaining these long-term knowledge, PELD-ILOC plays a fundamental role in understanding oceanic islands ecosystems and thereby provide the prerequisites for knowledge-based solutions to many current and future environmental problems.