Although heavily eroded and disturbed, Wadi Shab-GAS1 produced relevant evidence of a 4 th and 3 rd millennium BC prehistoric occupation. Packed in less than forty centimetres anthropogenic deposit, well-preserved stone structures, including huts and fireplaces, and a small group of burials, the site has provided a possibility to infer on the exploitation of a rich ecosystem located on the northeastern coast of Oman, near a permanent source of freshwater and close to key resources, by a prehistoric population of fishers living on a cliff facing the sea.