Proto-Indo-European mythology also in the myths of the slaying of the nine-headed Lernaean Hydra by Heracles and the slaying of Python by Apollo. The story of Heracles's theft of the cattle of Geryon is probably also related. Although Heracles is not usually thought of as a storm deity in the conventional sense, he bears many attributes held by other Indo-European storm deities, including physical strength and a knack for violence and gluttony. The original Proto-Indo-European myth is also reflected in Germanic mythology. In Norse mythology, Thor, the god of thunder, slays the giant serpent Jörmungandr, which lived in the waters surrounding the
Cetus (mythology) Cetus (mythology) In Ancient Greek, the word "kētos" (, plural "kētē" or "kētea", κήτη or κήτεα)—Latinized as cetus (pl. cetea)—denotes a large fish, a whale, a shark, or a sea monster. The sea monsters slain by Perseus and Heracles were each referred to as a "cetus" by ancient sources. The term cetacean (for whale) originates from "cetus". In Greek art, "cetea" were depicted as serpentine fish. The name of the mythological figure Ceto is derived from "ketos". The name of the constellation Cetus also derives from this word. Queen Cassiopeia boasted that she and her daughter Andromeda were more beautiful