Environmental variability, particularly changes in temperature and oceanographic conditions, can alter habitat suitability and drive shifts in the bathymetric distribution of demersal fish species. The Bathymetric Centre of Gravity (CoG) is a useful indicator for detecting temporal changes in species distribution along depth gradients. This study investigated temporal changes in the bathymetric distribution of the main gadiform species in the Strait of Sicily (GSA16): Merluccius merluccius (Linnaeus, 1758), Phycis blennoides (Brunnich, 1768), Trisopterus minutus capelanus (Lacepède, 1800) and Micromesistius poutassou (Risso, 1827). Bathymetric CoG was calculated from MEDITS survey data and analysed in relation to environmental variables (temperature, salinity, oxygen, pH, and phytoplankton carbon) derived from the Copernicus. Among the species examined, only P. blennoides showed a significant temporal decrease in bathymetric CoG, indicating a shift towards deeper waters. In contrast, M. merluccius exhibited a stable bathymetric distribution, while the low abundance of M. poutassou and T. minutus capelanus prevented reliable assessment of temporal trends. For P. blennoides, relationships between bathymetric CoG and environmental variables were explored. Because temperature, salinity and pH were strongly correlated, only temperature was retained to avoid collinearity. The decrease in bathymetric CoG was significantly associated with increasing deep-water temperature, suggesting redistribution towards deeper habitats. These species-specific responses may reflect differences in habitat preference, thermal tolerance and ecological plasticity. The stable CoG of the eurybathic M. merluccius suggests a greater capacity to cope with environmental change, whereas P. blennoides may track its preferred thermal habitat by moving deeper. In contrast, the decline of M. poutassou and T. minutus capelanus, species associated with upper-slope and neritic habitats, could indicate a limited ability to respond to warming through bathymetric or latitudinal shifts. Further studies are needed to confirm these patterns.