There seem to be about as many answers to this question as there are, well, combinations of seas and oceans. He lists the seven ancient seas as the Mediterranean, the Red, the Black, the Adriatic, and the Caspian, plus the Persian Gulf and the Indian Ocean. He agrees with Groves on the Mediterranean and Red Seas, the Indian Ocean, and the Persian Gulf, but adds the China Sea and the West and East African Seas to top off his list. The North and South Atlantic, the North and South Pacific, the Arctic and Antarctic, and the Indian. The Gulf Stream is a jetlike current of warm ocean water that meanders northeastward from the Straits of Florida to the coast of northwestern Europe.
Several factors work together to generate the stream.
The combined effect creates a clockwise circulation of water in the North Atlantic. Hence the Gulf Stream. When we asked one researcher, he gave a nervous chuckle and mumbled something to the effect that he'd explain it if we had time for an hour-long lecture on geophysics. In the narrow Straits of Florida, the Gulf Stream reaches a maximum speed of four knots, and its transport encompasses a volume of 1.1 billion cubic feet of water per second - or approximately 1,800 times that of the Mississippi River. But the Stream diffuses as it continues eastward.