See:
- Akdeniz’de 7.000 Yıllık Deniz Duvarı Bulundu-https://arkeofili.com/akdenizde-7-000-yillik-deniz-duvari-bulundu/
- https://www.timesofisrael.com/scientists-find-9000-year-old-seawall-built-to-stave-off-rising-sea-levels/
See:
Submerged Neolithic settlement Tel Hreiz.
Hellenistic shipwreck.
Submerged settlements and shipwrecks.