# Arethusa (Boeotia)

In Greek mythology, Arethusa (/ˌærɪˈθjuːzə/; Ancient Greek: Ἀρέθουσα, romanized: Aréthousa) is a minor figure who became a lover of the sea-god Poseidon, before undergoing a transformation at the hands of Hera during a lost episode of Greek myth. She then became the spring of the same name in Chalcis.
The New Archaeological Museum of Chalcis was named 'Arethusa' after this legendary woman.

## Mythology
### Poseidon

Arethusa's story is mostly known from a fragment of the Michigan papyrus (Papyrus Michigan, inv. no. 1447). The fragmentary Hellenistic text attributes the story to Hesiod, though it has been identified as part of the pseudo-Hesiodic Catalogue of Women, an epic poem written around the seventh or sixth century BC. The fragment, as restored by Reinhold Merkelbach and Martin Litchfield West, reads:
   Ἀρέθουσα θυγάτηρ μὲν Ὑπέρ[ο]υ, Π[οσ]ει[δῶνι δὲ συν]ελθοῦσα κατὰ τὸν Βοϊκὸν Εὔρειπον [εἰς κρήνην] ἠλλάγη ἐν Χ[αλκίδι] ὑπὸ [τῆς] Ἥρας, ὡς Ἡσίοδος ἱστορε[ῖ
According to the damaged text, Arethusa was the daughter of Hyperes, though it does not clarify whether this is Hyperes of Troezen or Hyperes of Boeotia. It further says that this Arethusa slept by the shore of the Euripus Strait (which separates the island of Euboea from mainland Greece) with a man whose name is not preserved, but which starts with 'P' and contains the diphthong 'ei'; it is generally accepted that this is meant to read 'Poseidon' (as Merkelbach and West restored). The theory is supported by the works of Hyginus and Stephanus of Byzantium, who wrote that Poseidon and Arethusa became the parents of the hero Abas, as well as Hesychius of Alexandria, who wrote that one of Poseidon's epithets was Euripios. Euboea was often called Abantis after Abas.

### Hera

Following her tryst with Poseidon, Arethusa was then transformed by the goddess Hera at a place starting with chi (Chalcis, the principal city of Euboea). The fragment however makes no mention of what Hera transformed Arethusa into, or why. The presence of a large spring called Arethusa in Chalcis (the principal spring of the city) leads to the deduction that Arethusa was changed into this spring, like other women in Greek mythology bearing the same name were.
Hera's motivations are harder to decipher. There are two possibilities behind her motive; either Hera did so in order to punish Arethusa over an unknown offence, or perhaps it was an act of mercy. Given that Arethusa's lover was Poseidon, and not Hera's husband Zeus, marital infidelity can be ruled out as the reason. It is possible that Arethusa made a hubristic remark against Hera or dared to compare herself to the queen of the gods. Alternatively, if Hera's motivation was sympathy and mercy, perhaps she did so to save Arethusa from some hardship or threat she was facing, like Athena did with Corone.
Arethusa's son Abas named his daughter Arethusa after his mother.

## Culture

The myth of Arethusa is an aetiological one, as its primary role is to explain the presence of the Arethusa spring in Chalcis. According to ancient authors, the clear waters of the spring were favoured by eels in particular, which were considered sacred. Moreover, it also establishes the reason behind the cults of Hera and Euripius Poseidon at Chalcis. The myth might have also been used to establish a genealogical link between Boeotia and Euboea, two regions that enjoyed great affinity in antiquity, if Arethusa's father is taken to be Hyperes of Boeotia, who was himself a son of Poseidon by the Pleiad Alcyone. Paul M. C. Forbes Irving argued that if the attribution to Hesiod is genuine, then it is a remarkably early date for a spring metamorphosis story, which tend to appear later, and perhaps Hesiod originally only mentioned her encounter with Poseidon.