The Pink Lagoon of Anse Scato During an exceptionally dry Lent season, intense water evaporation led to a significant increase in salinity, temperature, and pH levels within the lagoon. These extreme conditions, combined with strong sunlight, favored the spectacular development of a microalga known as Dunaliella salina. This phenomenon, called an algal bloom, corresponds to the rapid proliferation of microalgae, turning the water a striking pink color. Water samples and microscopic observations confirmed the presence of this species, which is particularly well adapted to highly saline environments. The characteristic pink coloration is caused by high concentrations of carotenoids, natural pigments produced by the algae to protect themselves from harsh environmental conditions. This rare natural phenomenon offers a remarkable spectacle and highlights the extraordinary ability of certain organisms to thrive in extreme habitats. Photographs and scientific observations: Laurent Juhel – Géo-Graphique.