Marine physical factors mainly influence ecological patterns on sandy beaches. However, most research focuses on benthic invertebrates in the intertidal zone, ignoring permanently dry areas and their terrestrial fauna. These organisms play a vital role as indicators of the health of the coastal ecosystem, which faces threats from urban development and coastal erosion. This research aims to describe the structure, taxonomic and functional composition of arthropod communities in the supralittoral zone on several beaches in Rio de Janeiro. This will help us understand how natural factors, such as erosion and anthropogenic influences, affect these communities. This data will be valuable for monitoring, spatial analysis, coastal beach management and conservation efforts. The study aims to establish a solid foundation for protecting coastal biodiversity, considering current and future human interventions. It is a fundamental scientific approach to preserving coastal ecosystems and their species.