Benthesikyme in Greek mythology according to Apollodorus (3.15.4), was a daughter of Poseidon and Amphitrite and wife of an unnamed Ethiopian by whom she had two daughters. She raised Eumolpus, son of Chione and Poseidon. Greek mythology comprises the collected legends of Greek gods, goddesses, heroes, and heroines, originally created and spread within an oral-poetic tradition. ... Apollodorus was a popular name in the ancient world. ... Andrea Doria as Neptune by Agnolo Bronzino: a potent allegory of Genoas hegemony in the Tyrrhenian Sea In Greek Mythology, Poseidon (Ποσειδῶν) was the god of the sea, known to the Romans as Neptune, and to the Etruscans as Nethuns. ... Mosaic from Herculaneum depicting Neptune and Amphitrite Amphitrite, in ancient Greek mythology, was a sea-goddess, and wife of Poseidon, identified with the Salacia the wife of Neptune in Roman mythology. ... In Greek mythology, Eumolpus was the son of Poseidon and Chione (or Hermes and Aglaulus). ... In Greek mythology, Chione was the daughter of Boreas and Orithyia. ...

When Chione gave birth, she was so frightened of her father's reaction that she threw the baby into the ocean. As Apollodorus relates:

But Poseidon picked him up and conveyed him to Ethiopia, and gave him to Benthesikyme (a daughter of his own by Amphitrite) to bring up. When he was full grown, Benthesicyme's husband gave him one of his two daughters. But he tried to force his wife's sister...

Accordingly Eumolpus was sent into exile.