Fish farmer's guide to combating parasitic infections in European sea bass and gilthead sea bream aquaculture

European sea bass and gilthead sea bream are the main fish species farmed in the Mediterranean region. They are produced in land-based extensive and intensive grow-out systems and sea cages. Millions of fingerlings are produced and traded in the region, with potential impacts on health control. Parasitic diseases are a serious constraint on production. Developed under the EU Horizon 2020-funded ParaFishControl project, this guide provides useful information about the biological background of five parasites, their diagnostics and control measures.