Thetis
Thetis was the Nereid whose son was destined to surpass his father — a prophecy so threatening that Zeus and Poseidon married her off to a mortal.
The Myth of Thetis
The prophecy about Thetis's son was the most consequential in Greek myth. Had Zeus or Poseidon fathered her child, that child would have overthrown the king of gods. They hastily married her to the mortal Peleus, producing Achilles — the greatest warrior, but mortal. Thetis tried to burn away or dip away his mortality. She warned him: a long, obscure life or a short, glorious one. She wept throughout the Iliad, knowing her son chose glory and death.
Parents
Nereus and Doris
Symbols
Fun Fact
The Thetis prophecy is the hidden engine of Greek mythology — it explains why the Trojan War happened to mortals instead of gods.
Words We Inherited
English words and phrases that trace back to this myth. See our full guide to English words from Greek mythology.
Explore Further
Thetis
🌿 nymphSea nymph mother of Achilles
Thetis was a sea nymph so powerful that both Zeus and Poseidon desired her — until a prophecy warned her son would surpass his father.
Oenone
🌿 nymphhealing, prophecy
Mountain nymph of Mount Ida who was Paris's first wife before Helen.
Clymene
🌿 nymphfame, ocean
Oceanid nymph and mother of Phaethon and the Heliades.
Autonoe
🌿 nymphnature, grief
A Nereid and, in separate traditions, a daughter of Cadmus who witnessed the death of her son Actaeon.
Meliboea
🌿 nymphnature, grief
A nymph (or mortal woman) who survived the massacre of Niobe's children and was preserved by her extreme pallor of terror.
Idyia
🌿 nymphKnowledge, Colchis
Oceanid nymph known as the knowing one and queen of Colchis beside King Aeetes
Coronis
🌿 nymphlove, betrayal
A Thessalian nymph or princess beloved by Apollo, whose infidelity led to the birth of Asclepius, god of medicine.
Galatea
🌿 nymphSea nymph loved by a Cyclops
Galatea was a Nereid loved by the Cyclops Polyphemus — but she loved the mortal Acis.
Perseis
🌿 nymphWitchcraft, sun
Oceanid nymph and mother of the sorceress Circe and King Aeetes of Colchis
Liriope
🌿 nymphrivers, prophecy
A river nymph who was the mother of Narcissus and the first person to consult the prophet Tiresias.
Eurydice
🌿 nymphWife of Orpheus, lost to the underworld
Eurydice was the nymph whose death drove Orpheus to descend to the underworld — only to lose her at the last moment when he looked back.
Penelope
🌿 nymphnature, pastoral
A mountain nymph of Arcadia who, in one tradition, was the mother of Pan by Hermes — distinct from Odysseus's famous wife.