Unchanged by any teller — how the centuries since have seen Cetus.
The gallery
Corinthian Vase depicting Perseus, Andromeda and Ketos
Unknown (Corinthian vase-painter), c. 575–550 BCE
This black-figure Corinthian vase preserves one of the earliest surviving depictions of the Andromeda episode. The sea-monster Cetus (Greek Ketos) rears as a great serpentine fish-beast at the right, its gaping jaws turned toward the hero, while Perseus strides forward to attack and the chained Andromeda waits beside the rock. The painter labels the figures in archaic Greek, fixing the iconography that would shape every later telling: the monster sent by Poseidon against Aethiopia, the exposed princess, and the rescuer who slays the beast and wins her.
Mosaic of a Cetus (sea-serpent) from Kaulonia
Unknown (Greek mosaicist), 3rd century BCE
Excavated at the ancient Greek colony of Kaulon (Kaulonia) in Calabria and now in the National Archaeological Museum of Reggio Calabria, this pebble-and-tessera mosaic renders the ketos in its canonical hybrid form: a coiling, dragon-headed sea-serpent with a finned, scaly body. It captures the imagined anatomy of the monster of myth — the devouring beast of the sea that Greek storytellers set against Andromeda — divorced from any single narrative scene and presented as a pure emblem of the deep.
Perseus and Andromeda
Peter Paul Rubens, c. 1622
Rubens stages the aftermath of the rescue in swelling Baroque movement. The victorious Perseus, crowned by a winged Victory, turns toward Andromeda as putti unbind her from the rock; one cherub holds the shield bearing the Gorgon's reflected face. Below them, vanquished, lies the slain Cetus — the sea-monster Poseidon had loosed against Aethiopia after Cassiopeia's boast. Painted in oil on canvas and now in the Hermitage Museum, Saint Petersburg, the work transforms the ancient ordeal into a luminous allegory of triumph and deliverance.
Loutrophoros with Perseus and Andromeda
Unknown (Apulian red-figure vase-painter), 4th century BCE
This South Italian red-figure loutrophoros gives the myth its theatrical Apulian treatment, with Perseus confronting the sea-serpent Cetus as Andromeda stands chained for the sacrifice. The vase belongs to a wider repertoire of Magna Graecia ceramics that dwelt on the Perseus saga, and its monster — a long-bodied marine beast with snapping jaws — repeats the ancient image of the ketos sent from the sea, the prey-maker that the hero must kill to free and win the princess.