Galicia, Spain, is renowned for its stunning coastline, and in 2025, its 'Sea of Ardora' continues to offer a radiant spectacle of bioluminescence. This mesmerizing phenomenon is most visible during the summer months, captivating locals and tourists alike.
The bioluminescence, locally known as 'Mar de Ardora,' is caused by the accumulation of the dinoflagellate Noctiluca Scintillans. When these microorganisms congregate, the movement of the water triggers a chemical reaction, producing a distinctive blue glow. This natural light show mirrors the effect seen with fireflies.
Galicia's marine environment, enriched by diverse currents, creates a thriving ecosystem that supports various species, including dinoflagellates. As water temperatures rise in the summer, these organisms flourish, leading to the increased visibility of the bioluminescent phenomenon along the Galician coast.