Othonoi Othonoi Othonoi (, also rendered as Othoni) is a small Greek island in the Ionian Sea, located northwest of Corfu, and is the westernmost point of Greece. Othonoi is the largest of the Diapontia Islands. It is a former community of the Ionian Islands. Since the 2011 local government reform it is part of the municipality of Corfu, of which it is a municipal unit. The municipal unit has an area of 10.078 km and population of 392 (2011). In the 19th century the island was the capital of the Diapontia Islands municipality, which also included nearby islands of Ereikoussa,
Sea of Marmara , with dimensions .Its greatest depth is . The sea takes its name from Marmara Island, which is rich in sources of marble, from the Greek "μάρμαρον" ("marmaron"), "marble". The sea's ancient Greek name "Propontis" derives from "pro-" (before) and "pontos" (sea), deriving from the fact that the Greeks sailed through it to reach the Black Sea, "Pontos". In Greek mythology, a storm on Propontis brought the Argonauts back to an island they had left, precipitating a battle where either Jason or Heracles killed King Cyzicus, who mistook them for his Pelasgian enemies. The surface salinity of the sea averages