The restinga is connected to the sandy beaches and all its biodiversity, including phytoplankton (microalgae and cyanobacteria), responsible for most of the planet's oxygen production, in addition to being a base of the marine food chain. Some of them are bioluminescent, emitting visible light through chemical reactions. Illuminated beaches: where to find the phenomenon of bioluminescence in Brazil? This phenomenon caused by microalgae (phytoplankton), especially Noctiluca scintillans, can occur in any region of the country, more frequently on the south and southeast coast of Brazil and generally in more protected and warmer waters. Its occurrence is more common in summer, however, with increasingly hotter days, there are records like this also in winter, demonstrating the lack of characterization of the seasons. Pollution also affects the intensity of the phenomenon, favoring the bloom of these microalgae due to the large availability of nutrients.