Answer: Greece, Bulgaria
Notes: Greece and Bulgaria are the basin countries of the "Strymonian Gulf". The Strymonian or Strymonic Gulf, also known as the Orfano Gulf, is a branch of the Thracian Sea—itself part of the Aegean Sea—lying east of the Chalcidice peninsula and south of the Serres regional unit. It was formerly known as the Gulf of Rendina, in reference to the ancient colony of Eion along the gulf's shores.
