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A sea serpent or sea dragon is a type of dragon described in various mythologies, most notably Greek (Cetus, Echidna, Hydra, Scylla), Mesopotamian (Tiamat), Hebrew (Leviathan), and Norse (Jörmungandr). The Hortus Sanitatis (Garden of Health), the first natural history encyclopedia, was published by Jacob Meydenbach in Germany, 1491.