Geochemical concentrations of elements measured in transects across otoliths of three Gulf of Mexico fish species collected from 2021-2023

This dataset describes the chemical composition of otoliths of three fish species (Red Drum Sciaenops ocellatus, Southern Flounder Paralichthys lethostigma, and Atlantic Croaker Micropogonias undulatus) collected in the Matagorda Bay region of Texas in the northwestern Gulf of Mexico. Otoliths were sectioned and analysed using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to obtain continuous core-to-edge transects of elemental variation across growth increments.