ABSTRACT. – Data on the presence of the green sea turtle, Chelonia mydas (Linnaeus, 1758) in the Gulf of Gabes (southern Tunisia) have been reviewed on the basis of published literature and unpublished records. Fifteen green turtles were recorded, of which only four were reported before 2004, when the national stranding network was established. Green turtles occur nearly throughout the year but the highest amount was observed in the spring and summer seasons (8 out of 15 records). The analysis of the content of the digestive tract supports the existence of a dietary shift, with the adults foraging almost exclusively on sea grass while juveniles adopt an omnivorous diet. Our study highlighted the importance of Cymodocea nodosa as a food item for the green turtle in the Gulf of Gabes. This study increases our knowledge on the occurrence, biology and interaction with human activities of C. mydas along the Tunisian coasts.