Oxeia (Greek: Οξεία) is a Greekisland in the Ionian Sea. It is the chief island in the southern group (the Ouniades) of the Echinades, part of the Ionian Islands. Oxeia possesses the highest point in the Echinades, 421 metres (1,381 feet). It is situated near the mouth of the river Acheloos, off the coast of Aetolia-Acarnania. The island is around 5 kilometres (3 miles) in length and its width is approximately 2 km (1 mile). The Battle of Lepanto took place near the island in 1571.