The underwater research and the excavation of the ancient harbour of Vryokastro in Mandraki bay started in 2005 and are still in progress.
At the sea bottom the foundations of coastal walls have been located. In addition, a breakwater of 100 metres length which set to the South the entrance of the harbour.
The whole basin and the buildings found on the shore and underwater have been imprinted.
In 2007, one of those went under excavation; it is probably part of the sank coastal fortified wall.
The excavation in 2008 and 2009 brought to light from the sea bottom important marble statues of the Roman Period, among which an armour-bearing torso of the 1st century B.C. and three hermaic steles of the 2nd century A.D.