For instance, the distribution process is really critical because each time the refrigerating room or the refrigerated truck is opened the temperature may change allowing microorganisms responsible for food contamination to reproduce at a higher rate. Besides fodder and water quality affect both fished and farmed fish quality: farmed fish has a high probability to be contaminated by farmers that feed on fish while fished fish can be contaminated when it comes from polluted areas or from areas affected by environmental damages (i.e. discharging toxic substances into the sea).