Solea solea is a flatfish living in shallow water on or close to the sea floor. It burrows into sandy or muddy bottoms. With sympatric distribution from the Bay of Biscay to Senegal and the western Mediterranean, S. solea extends its distribution from Norway and the western Baltic to Senegal, including the Mediterranean. Increase in production started in 1970 due to a significant increase in research for the improvement and intensification of the species production. The current available breeding techniques need to be optimised regarding the importance of sandy substrate, stress susceptibility, malformation, and slaughter. In addition, further research is urgent regarding home range, reproduction, and aggregation behaviour.