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Nereus, a MythSource painting
Greek

Nereus

The Old Man of the Sea · The Truthful One · The Gentle One

01Identity

Nereus in Greek tradition

Calm seas and truthful counsel mark Nereus apart from more restless sea powers. He is a Greek sea deity known as the Old Man of the Sea, a gentle and benevolent elder with prophetic gifts and the ability to change shape. Nereus personifies the sea in its calm and placid moods and is associated with marine life. Unlike Proteus, who avoids those seeking his prophecies by assuming many forms, Nereus is distinguished by his truthful and mild character.

Top questions

The quick answers

  • Who is Nereus?

    Nereus is a Greek deity associated with the sea and marine life; prophecy and divination; truth and truthful counsel; and shape-shifting.
    Source

    Source

    • The Library of Greek Mythology (Oxford World's Classics)
    • Bullfinch Mythology - The Age of Fable

  • What is Nereus the god of?

    Nereus is associated with the sea and marine life; prophecy and divination; truth and truthful counsel; and shape-shifting.
    Source

    Source

    • The Library of Greek Mythology (Oxford World's Classics)
    • Bullfinch Mythology - The Age of Fable

  • What family links are recorded for Nereus?

    Father: Pontus, Mother: Gaia, Spouse: Doris, 18 children.
02Family

Nereus’s family, at a glance

PontusGaia
Nereus

with Doris

AmphitriteCalypsoThetisArethusaGalateaNeritesPsamathePanopea
GaleneDynameneThaleiaSpeioDotoEuniceHalimedeSaoCymatolegeCallianassa
03The names

The names Nereus answers to

Halios Geron

Old Man of the Sea

SourceThe Library of Greek Mythology (Oxford World's Classics)

The Truthful One

A deity who does not lie and gives true counsel

SourceBullfinch Mythology - The Age of Fable

The Gentle One

A mild and benevolent sea elder

SourceBullfinch Mythology - The Age of Fable

04The myths

The myths of Nereus

2 myths, with sources recorded for each.

The Birth of Nereus

Gaia brought forth Pontos, the sea, without prior intercourse. Pontos and Gaia then produced Nereus, one of the ancient powers of the sea. Nereus belonged to the first generation of marine beings descended from earth and sea. His birth followed Gaia’s emergence and her creation of Pontos, and placed him among the earliest sea powers.

Hesiod described Nereus as gentle, truthful, and knowing. He did not lie, forget ordinances, or give false judgement. He knew just and gentle counsels, and he was unerring. His name carried associations with truth and with not forgetting. He stood opposite forces such as Discord and Bad Governance. In this role, he joined straight justice with gentle conduct, sound counsel, and reliable judgement.

Nereus was also known as the wise and unerring Old Man of the Sea. Prophetic knowledge was attributed to him, and this knowledge gave him authority when others sought guidance. He later fathered the Nereids with Doris. The Nereids were sea nymphs descended from their union. Among them were Amphitrite, Thetis, and Galatea. Thetis became the mother of Achilles, while Galatea was loved by the Cyclops Polyphemus.

The Birth of Nereus, a MythSource painting of the scene

3 sources· checked 2026-08-19

  1. 1The Library of Greek Mythology (Oxford World's Classics)T1
  2. 2Hesiod, TheogonyT1

    Quote

    “Pontos and Gaia produced Nereus, the eldest of their children, who is gentle, truthful, unerring, and acquainted with just and kindly thoughts.”

    Hesiod, Theogony

  3. 3Greek Myths & TalesT1

Nereus and Doris

Nereus married Doris, the daughter of Oceanus, and together they became the parents of the Nereids, the sea nymphs. They were usually said to number fifty. The Nereids lived with their father in a cave at the bottom of the sea. Nereus was associated chiefly with the Aegean Sea and was represented as an old man with azure hair.

Nereus was known for wisdom, truth, and justice. He was called the unerring Old Man of the Sea, and he possessed the gift of foretelling future events. The Nereids were shown with him, dancing around him in chorus. They became his daughters and attendants.

Among the most celebrated Nereids were Amphitrite, Thetis, and Galatea. Amphitrite became the wife of Poseidon and the mother of Triton. Poseidon came to court her riding on a dolphin. After winning her, he placed the dolphin among the stars as a reward.

Thetis became the mother of Achilles. Galatea was loved by the Cyclops Polyphemus. The Nereids also helped Jason after his quest for the Golden Fleece. They guided the Argo through the Clashing Rocks on its return, and, according to Apollonius of Rhodes, Thetis led them in this task. In another account, Poseidon acted against Ethiopia after Cassiopeia claimed to be more beautiful than the Nereids. He sent a flood and a sea monster, and Andromeda was offered as a sacrifice until Perseus came to her rescue.

Nereus and Doris, a MythSource painting of the scene

3 sources· checked 2026-08-19

  1. 1The Library of Greek Mythology (Oxford World's Classics)T1
  2. 2Hesiod, TheogonyT1

    Quote

    “Doris, daughter of Ocean, bore to Nereus, the Old Man of the Sea, fifty daughters known as the Nereids, who are named in the poem.”

    Hesiod, Theogony

  3. 3Greek Myths & TalesT1

Also mentioned in

Stories elsewhere on MythSource that mention Nereus, each on that figure’s page.

Continue the road

More of Nereus’s family, sourced

GaiaMotherGalateaChild