Playing his chitara, Arion song a praise to Apollo, the god of poetry, and his song attracted a number of dolphins around the ship. At the end of the song Arion threw himself in the sea rather than be killed, but one of the dolphins saved his life and carried him to safety at Cape Taenarum. Arion then continued to Corinth by other means and arrived before the sailors that tried to kill him. On his return to Corinth, the king didn't quite believe Arion's fantastic story. The sailors believed Arion was dead in the sea, and on arrival in Corinth they told the king that Arion had decided to remain in Italy. The king then understood that Arion's story was true and punished the sailors with death. Herodotus I, 23-24
Other variations of the story exist.
Arion is also the title of an anime movie. In this movie, Arion is kidnapped by Hades as a child, and is raised to believe that his mother's blindness Demeter was a curse from Zeus, and that only Zeus' death could lift the curse.