The pink Lake Retba in Senegal, East Africa. Its colour is caused by the micro-algae Dunaliella salina which creates large amounts of carotenoids, an orange-red pigment, that turns the water pink. The salt content is close to 40% which, like that of the Dead Sea, allows people to float easily.
Dolphins in Lake Retba or Lac Rose. The lake lies north of the Cap Vert peninsula of Senegal, north east of Dakar. Depending on the time of day, the lake changes colour from a light purple to a deep scarlet pink. The unusual colouring of the water is caused by harmless halophilic bacteria that thrive in the lake’s high-salinity environment. The color is particularly visible during the dry season.
The pink color comes from microorganisms called Dunaliella salina, which thrive in the extremely salty lake. The red pigment is D. salina‘s version of chlorophyll, allowing the organisms to collect energy from the sun. All of this is natural, if visually insane. Sometimes nature is easily as crazy-looking as human-made pollution.