Messolongi Lagoon
 The Messolongi Lagoon (Greek: Λιμνοθάλασσα Μεσολογγίου Limnothalassa Mesolongiou) is a shallow lagoon located in the south of Aetolia-Acarnania western Greece. It is connected to the Gulf of Patras a bay of the Ionian Sea. Its length is approximately 15 to 20 km along with its width its shape resembles a triangle.The deepest depth is 5 to 6 m other than the largest part in which its depths does not pass over half a metre and it contains seaweeds.