Adriatic Sea southeast, the Adriatic Sea connects to the Ionian Sea at the wide Strait of Otranto. The International Hydrographic Organization (IHO) defines the boundary between the Adriatic and the Ionian seas as a line running from the Butrinto River's mouth (latitude 39°44'N) in Albania to the Karagol Cape in Corfu, through this island to the Kephali Cape (these two capes are in latitude 39°45'N), and on to the Santa Maria di Leuca Cape (latitude 39°48'N). It extends from the northwest to the southeast and is wide. It covers and has a volume of . The Adriatic extends northwest from 40° to
Proti Island Proti Island Proti Island of Messenia (Πρώτη Μεσσηνίας) is an island in the Ionian Sea, on the west coast of the Peloponnese; it is counted as one of the Ionian Islands, though administratively, it is part of the municipality of Gargalianoi, in the regional unit of Messenia. The 2001 census reported a population of four inhabitants. The name of the island derives from the ancient sea god Proteus, son of Poseidon. The island was mentioned by ancient writers. The first reference of the island was in the history of Thukydides who refers that in 426 B.C. the Athenian fleet sailed