Oxidative stress, Fish, Temporal variability, Metals, Coastal lagoon, Water Pollutants, Chemical, Gills - enzymology, Biomarkers - analysis, Environmental Monitoring - methods, Seawater - chemistry, Gills - chemistry, Eutrophication, Animals, Metals, Heavy - toxicity, Lipid Peroxidation - drug effects, Metals, Heavy - analysis, Environment, Seasons, Smegmamo...