This dataset focuses on the semantics of more than 25 words (nouns, verbs, adjectives) pertaining to the semantic field SEA in Latin and Ancient Greek. The corpus includes four texts: (i) for Latin, De bello Gallico (Caesar) and Aeneid 1-6 (Vergil); (ii) for Greek, Histories 1-2 (Herodotus) and Argonautica (Apollonius Rhodius). Data has been extracted after manually annotating the texts through the annotation tool INCEpTION.