Galatea was born into the oldest family of the sea. Her father Nereus, son of Pontus and Gaia, was a wise and gentle sea god whom Homer calls the Old Man of the Sea because of his truthfulness and age. Her mother Doris was one of the three thousand daughters of Oceanus and Tethys, the primordial powers of the world-encircling waters. Doris and Nereus had fifty daughters, the Nereids, who personified every aspect of the sea: its calm, its depths, its gifts, its dangers and its beauty. Galatea stood among the most celebrated. Homer places her in the shining company that comes to Thetis when the goddess cries out in grief for her son Achilles, the greatest of the Greek heroes at Troy. Hesiod gives her a name in the catalogue of Nereids, where her beauty belongs to the same family as Thetis, Amphitrite and Psamathe.

Her name carried two sea-born meanings. Galatea could be understood as the milk-white one, recalling the pale foam that crowns a breaking wave and the luminous surface of calm water. It could also be read as the goddess of calm seas, built from Greek words for tranquillity and divinity. Both meanings follow her through art. Greek and Roman painters place her among dolphins, sea monsters and Nereid sisters, a radiant woman whose body seems composed from foam, pearl and light. She belongs to the surface of the water, visible in sunlit ripples, while the Cyclops who desires her belongs to rock, smoke, flocks and caves.

The oldest surviving love story does not begin with Galatea herself but with the lost Cyclops of Philoxenus of Cythera. Philoxenus, a dithyrambic poet of the late 5th and early 4th centuries BCE, visited Sicily and created a poem called Cyclops or Galatea in which the monster of Homer's Odyssey became a lovesick musician. Ancient storytellers said that the poet had fallen into conflict with Dionysius I, tyrant of Syracuse, over a woman or flute girl named Galatea. Condemned to the quarries, Philoxenus supposedly transformed his punishment into art: Dionysius became the one-eyed giant, the beloved Galatea became the sea nymph, and Philoxenus slipped into the role of the clever Odysseus.

Only fragments remain, but they reveal a startling reinvention. Philoxenus' Polyphemus played the cithara, the sophisticated professional lyre, and tried to cure his love through music. He praised Galatea's face, hair and voice but said nothing about her eyes, a detail ancient critics found deliciously appropriate for a Cyclops who had not yet lost his single eye but somehow sensed the blindness to come. Odysseus appears as a roguish counsellor offering spells, love charms and promises to win the nymph, while the giant laughs at his ingenuity. Philoxenus made desire civilise the monster. The man-eater still lived in a cave, but now he had a lyre, a longing and a mirror in which to consider his reflection.

The Hellenistic pastoral poets made the love story gentler and funnier. In Theocritus' Idyll 11, Polyphemus is no longer the cannibal who traps Odysseus' crew. He is a young shepherd with scarcely a beard, sitting alone on the beach from dawn until night, struck by a wound from Aphrodite, goddess of love. His flocks wander home unguided while he sings of Galatea to the empty sea. He praises her as whiter than curds, softer than a lamb, more skittish than a calf and sharper than an unripe grape. He longs for gills so that he can dive beneath the waves and reach her. He offers her cheese, milk, a lamb, a bear cub and the pastoral wealth of Sicily. Then, with the reckless dignity of a rejected lover, he reminds himself that other girls on land giggle when he answers their calls. Song, he decides, is a better cure than money. The reader laughs at the monster, but the laugh carries sympathy.

Theocritus' Idyll 6 reverses the pursuit. A herdsman plays the part of Polyphemus and claims that Galatea now throws apples at his flocks, mocks his dog and calls after him because he has learned to ignore her. Her absence has made her pursue him. The sea nymph remains mostly offstage, imagined through the voices of shepherds and the complaints of the Cyclops, yet her power is clear. By refusing him, or pretending to refuse him, she controls the story. The land longs for the sea and the sea will not be possessed.

A shrine of Galatea near Mount Etna gave the myth a physical location. One tradition said that Polyphemus had founded it in gratitude for the rich pasture and abundant milk of Sicily. Philoxenus, another tradition claimed, invented the love story because he could not discover why the shrine existed. The story and the sanctuary fed each other. By the Roman period, Galatea had a sacred place on the island where she could be imagined rising from the waves, while Polyphemus could watch from the slopes with his flock behind him.

Ovid gave the myth its tragic form in the Metamorphoses. He places Galatea beside Acis, a youth of sixteen whose father is Faunus, the Roman Pan, and whose mother is the nymph Symaethis, daughter of the River Symaethus. Acis has only the first down upon his cheek, but Galatea loves him and he loves her in return. Polyphemus also loves her. Galatea tells the story to her sister Scylla, the sea monster who had once rejected mortal suitors, and her account joins mockery with grief. The Cyclops' love, she says, burned as fiercely as her hatred of him. She could not decide which was stronger, her hatred of Polyphemus or her love of Acis.

Polyphemus tries to transform himself into a desirable lover. He rakes his matted hair, trims his shaggy beard with a sickle, studies his fierce features in a quiet pool and practises softening the expression that once frightened travellers. The giant who mocked Zeus now submits to Aphrodite. Galatea and Acis hide behind a rock and listen as he sings of his wealth, his flocks, his size, his single eye, which he boasts is as large as a shield, and his willingness to burn the whole world if Galatea will not yield. The song is ridiculous and dangerous at once.

Then Polyphemus sees the lovers. He roars so loudly that Mount Etna shudders. Galatea dives into the sea, but Acis turns to run and calls on his father and mother. The giant tears a piece of the mountain from its roots and hurls it. Even the edge of the rock is enough to crush Acis beneath its mass. Galatea returns from the waves and uses the power inherited from her sea-born family. She makes Acis' blood emerge from beneath the stone as a stream, gives his body the features and strength of a river god and grants him a new form crowned with reeds. The River Acis still flows in the mythic landscape of Sicily, and its water joins Galatea's own element. Her beloved dies as a mortal but becomes water, sharing her world forever.

Not every ancient tradition ended in rejection. Bacchylides gives Galatea and Polyphemus a son named Galatos, and later mythographers turned this child into the eponymous ancestor of the Gauls. Appian expands the family into three sons, Celtus, Illyrius and Galas, from whom the Celts, Illyrians and Gauls descend. A fresco from Pompeii shows Galatea and Polyphemus locked in a naked embrace. Another shows the Cyclops seated with his cithara while Cupid brings him a love letter from the nymph. Propertius says that Galatea wheeled her dripping horses through the sea at the sound of Polyphemus' song. Lucian writes a dialogue between Galatea and her sister Doris, in which Doris mocks her for having the monster as a lover and Galatea answers that she is flattered to be chosen above all her sisters, whether she loves him or not. In Nonnus' Dionysiaca, she has learned to sing and dance from Polyphemus' syrinx and carries his club into battle. The rejected nymph could also become the giant's wife and the mother of wild northern peoples.

Ancient art kept both elements before the eyes: Galatea's radiant freedom and Polyphemus' frustrated desire. Philostratus describes a painting in which the sea nymph sports across the waves in a chariot drawn by four dolphins while Triton's daughters guide the reins. She holds a sea-purple veil that acts as sail and shade, her wet hair resists the wind, and her foot touches the water like a rudder. Onshore the Cyclops watches, not devouring travellers but composing pastoral verses beneath an oak. The comedy remains, but the division between sea and land becomes a picture of impossible love. Gustave Moreau, Odilon Redon and Auguste Rodin would later take up the same haunting contrast.

The Renaissance gave Galatea a second life without changing her. Raphael's Triumph of Galatea shows her riding a shell drawn by dolphins, surrounded by tritons and amorous sea gods, while the story of Acis is recounted in a separate fresco by Annibale Carracci. Poussin places the lovers in a lush Sicilian landscape with Polyphemus singing on the mountain above them. The giant discovers the hidden pair in many baroque paintings, and sculptors arrange the three figures in gardens and fountains: Acis and Galatea locked in white marble below, Polyphemus looming in dark bronze above. Handel's Acis and Galatea, with a libretto by John Gay, turns the myth into pastoral opera, balancing the lovers' tenderness against the comic menace of Polyphemus.

The other Galatea arose much later. In Ovid's story of Pygmalion, the sculptor falls in love with an ivory statue that he has carved as his ideal woman, prays to Aphrodite and sees the image soften into life. No ancient surviving text gives that statue a name. Renaissance and modern writers borrowed the name Galatea for her because it meant milk-white and already belonged to a beautiful woman created by sea and light. By the 18th century, Pygmalion's beloved had become Galatea in art and literature. The name now carries two intertwined legends: one about a nymph who will not be possessed by the monster on the shore, and one about an artificial woman who awakens into a life chosen by her creator.

Galatea remains powerful because every version tells a story about desire and possession. Polyphemus desires what he cannot reach and tries to force sea, music and beauty into the shape of his longing. Acis and Galatea share a love interrupted by violence, but the sea restores her beloved as a river. Later traditions give the monster his song, his wife and his children, turning rejection into union. Through it all, Galatea moves freely between water, myth and art, whiter than foam and calmer than the storm, always just beyond the reach of the giant who watches from the land.