Achelous in Greek tradition
As a river deity, Achelous fought Heracles for Deianeira, taking serpent and bull forms before Heracles broke off one of his horns. He conceded defeat, and Heracles won Deianeira as his bride. In the related account, Achelous exchanged the broken horn for Amalthea’s horn, which became the cornucopia, linking the Lord of Rivers with fertility and abundance.
The quick answers
Who is Achelous?
Achelous is a Greek deity associated with rivers and freshwater, springs and streams, fertility, abundance and agricultural prosperity.Source
Source
- Classical Mythology a to Z
What is Achelous the god of?
rivers and freshwater, springs and streams, fertility, abundance and agricultural prosperitySource
Source
- Classical Mythology a to Z
What family links are recorded for Achelous?
Mother: Nais, Spouse: Calliope, 14 children.
Achelous’s family, at a glance
Parents above, children below, and the figure’s consorts named in between, the same family data as the fact box, laid out as a chart instead of a field list.
with Calliope, Melpomene, Perimede, Sterope, Terpsichore
The names Achelous answers to
Acheloos
Modern transliteration of the Greek name
SourceClassical Mythology a to Z
Akheloios
Scholarly transliteration of the Greek name
SourceClassical Mythology a to Z
Father of Rivers
Poetic title emphasizing his river-god status
SourceClassical Mythology a to Z
Lord of Rivers
Title for his authority over rivers
SourceClassical Mythology a to Z
The myths of Achelous
2 myths, each traced to its primary text and corpus sources.
Achelous Battles Heracles for Deianeira
Achelous faced Heracles in single combat for the right to marry Deianeira, daughter of Oeneus, king of Aetolia. Both had claimed her hand, so the matter was to be settled by fighting. Achelous, the river god, trusted his ability to change his shape during the contest.
He first assumed the form of a serpent. Heracles continued to fight him and did not yield to the change. Achelous then took the form of a bull. Heracles seized the advantage in that shape, overpowered him, and broke off one of his horns. Achelous was forced to admit defeat and withdrew from the contest.
Heracles therefore won Deianeira as his wife. The account also identifies Achelous as a river, described as the largest in Greece. It flowed along the Acarnanian frontier of Aetolia for part of its course. River gods were thought to appear in the form of bulls. This belief accounts for Achelous’s final shape during the combat. His changes of form allowed him to challenge Heracles in different ways, but they did not prevent Heracles from overcoming him. After the horn was broken and the contest ended, Achelous gave up his claim to Deianeira, leaving Heracles as the victor and her future husband.
In the modern world
No modern rework confirmed yet.
3 sources· checked 2026-08-19
- 1Greek Myths & TalesT1
- 2Apollodorus, The LibraryT1
Quote
“Achelous fought Heracles for Deianeira, changing into a serpent and then a bull, until Heracles broke off the bull’s horn and won the contest.”
Apollodorus, The Library
- 3The Library of Greek Mythology (Oxford World's Classics)T1
Achelous Gives Up the Horn of Plenty
Heracles arrived in Calydon and sought Deianeira, the daughter of Oineus, king of Aetolia. Achelous, the river god, also wanted to marry her. They agreed that Deianeira’s hand would go to the victor in single combat. Achelous trusted his power to assume different forms, but this did not secure his victory.
Achelous changed into a bull. Heracles seized him and broke off one of his horns. Achelous admitted defeat, and Heracles won Deianeira. The broken horn was exchanged for the horn of Amalthea. In another telling, the broken horn was first replaced and was then exchanged for Amalthea’s horn. The exchanged horn became the cornucopia, or horn of plenty.
In one telling, Amalthea was the nymph who fed the infant Zeus with milk from her goat, rather than the goat itself. In another, Zeus turned the goat into a constellation as a reward and gave one of its horns to the nymphs who had cared for him. He endowed the horn with the power to produce whatever they wished. On that telling, Amalthea’s horn was not a bull’s horn. Another telling identified it with the horn that Heracles broke from Achelous.
In the modern world
No modern rework confirmed yet.
2 sources· checked 2026-08-19
- 1The Library of Greek Mythology (Oxford World's Classics)T1
- 2Apollodorus, The LibraryT1
Quote
“When Heracles had broken off Achelous’s horn, Achelous gave him the horn of Amalthea, which could provide whatever its possessor desired.”
Apollodorus, The Library
Also appears in
The myths across MythSource where Achelous features, each on that figure’s page.
- Eriphyle Sends Alcmaeon with the Epigoni · on Eriphyle
- Eriphyle’s Matricide · on Eriphyle
- Heracles and Achelous · on Heracles
- Heracles Marries Deianira · on Heracles
1 work catalogued
This is the candidate catalogue for Achelous: candidate reworks first, then references, then names used as atmosphere. Nothing here has been checked against a source yet. Only reviewed myth-to-work links are promoted in Overview.
Showing 1 of 1 works.
Game1
- Planet AchelousName only
These are catalogue candidates, not proof that every work retells this figure. Reviewed myth-to-work links appear in Overview.
What this page is built from
About this page
Written and maintained by MythSource. Last reviewed not yet recorded. How a page gets built.
3 sources are cited on this page, primary texts and corpus scholarship, listed below.
Cite this page
MythSource. (n.d.). Achelous. https://www.mythsource.com/figures/achelous
"Achelous." MythSource, n.d., www.mythsource.com/figures/achelous.
"Achelous." MythSource. n.d. https://www.mythsource.com/figures/achelous.
The mythology summaries and identity fields on this page are grounded in the primary texts and scholarship above. The appearance table records candidates separately; only reviewed joins are presented as modern reworks in Overview.
The film
The Underdrawing video on Achelous embeds here once it publishes.