The Red Sea is one of the warmest, saltiest, and possibly reddest seas around the world. It contains an algae called trichodesmium erythraeum, which turns blue-green water, reddish-brown. Hence the sea was then known as the Red Sea.
2 Additional Answers
The name Red Sea originates from a Greek phrase called Erythra Thalassa. Some archaeologists suggest that it is thus named as a result of the seasonal blooms of a water plant known as Trichodesmium erythraeum.
The Red Sea gets it's name from a type of algae that lives in it. This algae called Trichodesmium Erythrauem has blooms that die and when that happens, the sea become tinted a reddish brown color.
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