Residues, PLS-DA, Paracentrotus lividus, GC–ITMS, PAH, Water Pollutants, Chemical - metabolism, Environmental Monitoring, Animals, Gas Chromatography-Mass Spectrometry, Polycyclic Aromatic Hydrocarbons - metabolism, Polycyclic Aromatic Hydrocarbons - analysis, Paracentrotus - chemistry, Female, Italy, Male, Paracentrotus - metabolism, Water Pollutants, Chemi...