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the Greek thalassa erythra; the reason for the name is unknown; speculation has traced it to: 1. algae in coastal waters; 2. sandstone rock formations on the shores; 3. a tribal name; 4. ancient association of "red" with "south" (as "black" with "north").
Narrow sea between Africa and the Arabian Peninsula.
Note: Probably named for the red algae that are sometimes present in its waters.
Note: According to the Bible, the Red Sea's waters parted to allow the Israelites, led by Moses, to escape the pursuing Egyptian army. The “Red Sea” of the biblical account, however, seems more likely to have been the marshy Sea of Reeds than the present-day Red Sea.
The sea so called extends along the west coast of Arabia for about 1,400 miles, and separates Asia from Africa. It is connected with the Indian Ocean, of which it is an arm, by the Strait of Bab-el-Mandeb. At a point (Ras Mohammed) about 200 miles from its nothern extremity it is divided into two arms, that on the east called the AElanitic Gulf, now the Bahr el-'Akabah, about 100 miles long by 15 broad, and that on the west the Gulf of Suez, about 150 miles long by about 20 broad. This branch is now connected with the Mediterranean by the Suez Canal. Between these two arms lies the Sinaitic Peninsula. The Hebrew name generally given to this sea is _Yam Suph_. This word _suph_ means a woolly kind of sea-weed, which the sea casts up in great abundance on its shores. In these passages, Ex. 10:19; 13:18; 15:4, 22; 23:31; Num. 14:25, etc., the Hebrew name is always translated "Red Sea," which was the name given to it by the Greeks. The origin of this name (Red Sea) is uncertain. Some think it is derived from the red colour of the mountains on the western shore; others from the red coral found in the sea, or the red appearance sometimes given to the water by certain zoophytes floating in it. In the New Testament (Acts 7:36; Heb. 11:29) this name is given to the Gulf of Suez. This sea was also called by the Hebrews Yam-mitstraim, i.e., "the Egyptian sea" (Isa. 11:15), and simply Ha-yam, "the sea" (Ex. 14:2, 9, 16, 21, 28; Josh. 24:6, 7; Isa. 10:26, etc.). The great historical event connected with the Red Sea is the passage of the children of Israel, and the overthrow of the Egyptians, to which there is frequent reference in Scripture (Ex. 14, 15; Num. 33:8; Deut. 11:4; Josh. 2:10; Judg. 11:16; 2 Sam. 22:16; Neh. 9:9-11; Ps. 66:6; Isa. 10:26; Acts 7:36, etc.).