Number of reads (top) and number of MOTUS (bottom) of marine origin in relation to distance to the sea. Samples collected within 1 km of the coast were considered close to sea, while samples collected at more than 1 km inland were considered as distant from the sea. Only samples with more than 50 reads from marine origin are represented. Seafood include fish, molluscs, cephalopods, crustaceans and echinoderms, while non-seafood include Polychaetes, Tunicates, Hydrozoa and Amoeba.