The ISOMED (A Stable ISOtope database of MEDiterranean marine food web components) database gathers published and unpublished data of δ^₁₃C and δ15N values and elemental contents (C and N) of basal sources (i.e., organic matter) and consumers collected in the Mediterranean Sea. Published data refers to scientific peer-reviewed papers selected in the literature through a systematic search. In contrast, unpublished data correspond to the raw δ¹³C and δ¹⁵N data underpinning mean values provided by the authors of the present paper. Data from open-access repositories was not included, as they are already easily accessible.

The dataset consists of 4959 georeferenced records spread all around the Mediterranean Sea, spanning 35 years (1983-2018). ISOMED database consists of a unique tool that could help researchers investigate trophic interactions and energy flows in the marine food web of the Mediterranean Sea.