Why are some lakes in nature pink?

There are pink lakes, such as Rateba Lake in Senegal, Hillier Lake in Australia and rose Lake in British Columbia. The pink color of the lake is caused by Dunaliella salina.

Dunaliella salina is a halophilic green microalgae, belonging to Volvariella of Chlorophyta, which is common in salt fields. Because of its unique color, the lake will be dyed red or pink. Lake Rateba, 35km north of Senegal's capital in West Africa, is nicknamed "Pink Lake" because of its unique pink color due to Dunaliella salina.

183 1 year, French biologist Dunar accidentally discovered a red unicellular algae with double flagella at its tail in some salt ponds along the Mediterranean coast. Later generations named it Dunaliella salina to commemorate his discovery. Because it has no cell wall, it is different from other dicflagellate unicellular algae, so it has been established as a new genus of Dunaliella by later generations.

Dunaliella salina is a halophilic unicellular eukaryotic algae, one of the most salt-tolerant eukaryotes discovered so far, and the earliest form of life embryo. Dunaliella salina is common in salt fields, because its unique color will dye the lake red or pink. Dunaliella salina is less than 15 micron in length and about 10 micron in width, which can only be seen under a microscope. Dunaliella salina has unique characteristics of animals and plants, such as sunlight resistance, strong acid and alkali resistance, cold resistance (-27 degrees Celsius) and extreme heat (+53 degrees Celsius). Even under extremely harsh natural conditions, this extreme creature resolutely glows with tenacious vitality. Known as "the miracle of life blooming in the Dead Sea!" "