What are the “seven seas” that Medieval writer…

What are the “seven seas” that Medieval writers loved to mention?

  1. the Adriatic Sea
  2. the Mediterranean Sea – which includes seas around and in the Mediterranean, like the Aegean Sea, Ionian Sea and Tyrrhenian Sea
  3. the Black Sea
  4. the Caspian Sea
  5. the Persian Gulf
  6. the Arabian Sea – which is today considered part of the Indian Ocean
  7. the Red Sea – including closed Dead Sea and the Sea of Galilee