4. Discussion
The study of DNA methylation dynamics and its contribution to salinity acclimation through changes in gene expression are of particular importance in European sea bass, a truly euryhaline species, that encounters frequent salinity fluctuations in its natural environment. There is clear evidence that a two-week freshwater transfer affects genome-wide DNA methylation in European sea bass juveniles. Salinity-induced methylation changes were compared in different genomic contexts (promoters vs the body of genes).