Poseidon son named Triton, a merman. Poseidon was the father of many heroes. He is thought to have fathered the famed Theseus. A mortal woman named Tyro was married to Cretheus (with whom she had one son, Aeson), but loved Enipeus, a river god. She pursued Enipeus, who refused her advances. One day, Poseidon, filled with lust for Tyro, disguised himself as Enipeus, and from their union were born the heroes Pelias and Neleus, twin boys. Poseidon also had an affair with Alope, his granddaughter through Cercyon, his son and King of Eleusis, begetting the Attic hero Hippothoon. Cercyon had his
Poseidon Burkert noted; "the myth turns this into a temporal-causal sequence: in his anger at losing, Poseidon led his son Eumolpus against Athens and killed Erectheus." The contest of Athena and Poseidon was the subject of the reliefs on the western pediment of the Parthenon, the first sight that greeted the arriving visitor. This myth is construed by Robert Graves and others as reflecting a clash between the inhabitants during Mycenaean times and newer immigrants. Athens at its height was a significant sea power, at one point defeating the Persian fleet at Salamis Island in a sea battle. Poseidon and Apollo,