The Red Sea got its name because its surface sometimes has a reddish tinge. This colour comes from a free-floating type of alga, or water plant, called Trichodesmium erythraeum. The algae are normally blue-green in colour but have an additional red pigment that sometimes becomes dominant and dyes the sea red.
This sea is a narrow strip of water about 1,200 miles Long. It varies in width from about 250 miles in the south to 130 miles in the north, where it divides into two parts, the Gulf of Suez and the Gulf of Aqaba. Extending south-south-east from Suez to the Gulf of Aden, the Red Sea separates Saudi Arabia and the Yemen from Egypt, Sudan and Ethiopia.
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