Gilthead seabream, Enterococci, Antibiotic resistance, Seawater - microbiology, Animals, Water Pollution, Chemical - statistics & numerical data, Sea Bream - microbiology, Enterococcus - isolation & purification, Humans, Environmental Monitoring - methods, Seawater - chemistry, Drug Resistance, Bacterial - genetics, Enterococcus - physiology, Enterococcus -...