While primarily known as a goddess of the wilderness and mountains, Artemis has several strong connections to the ocean, lakes, and marshes in Greek mythology, often associated with her role as a "mistress of wild nature" and her retinue of water nymphs.
Here are specific instances of Artemis and the ocean/water:
Request for Oceanid Companions: When asking Zeus for her boons as a child, Artemis requested sixty Ocean-nymphs (daughters of Oceanus) to be her companions and choir.
Worship as Limnatis (Lady of the Lake): Artemis was often worshipped in marshy areas or near lakes, such as the Temple of Artemis Limnatis on the border of Messenia and Laconia.
The Legend of Saronia: Artemis was worshipped under the name Saronia at Troezen. This derived from a myth where King Saron was chasing a doe (an animal sacred to Artemis) that plunged into the sea; he followed it and drowned in the waves.
The Myth of Britomartis/Diktynna: Artemis was closely associated with, and often assimilated with, the Cretan nymph Britomartis (also known as Diktynna). Britomartis, fleeing the pursuit of King Minos, jumped into the sea and was saved by fishermen’s nets, becoming a goddess of nets and fishing (often associated with the sea).
Associations with Tauropolos: Artemis was worshipped as Tauropolos (the Tauric goddess), a title that connects her to the sea-crossing myth involving Iphigenia, who was rescued by Artemis and brought to the Tauric Chersonese.
Sea as Witness to Her Power: In the Homeric Hymns, it is described that as Artemis travels through the mountains, "earth quakes and the sea also where fishes shoal".
Shared Spaces with Poseidon: Artemis and Poseidon shared a sacred space in Eleusis, reflecting her connection to the marine deity.
Artemis Eurynome: In Phigalia, a local form of Artemis named Eurynome was depicted in a, likely, mermaid-like shape, inhabiting a temple surrounded by cypress trees near the meeting of two streams.
These instances indicate that while Artemis was not a sea deity, her dominion over the wild meant her power extended to the coastline, marshes, and the creatures within them.
The Moon- The Woman of Revelation (Mary/Church): Revelation 12:1 depicts a woman with the moon under her feet and a crown of twelve stars. Many commentators interpret this woman as the Virgin Mary or as a symbol of the Church.
Jesus Christ (Prophetic Context): The moon is connected to the End Times, where it is prophesied to turn into blood and be darkened (Matthew 24:29, Acts 2:20).
The "Moonstruck" People: In Matthew 4:24 and 17:15, Jesus heals people described in some translations as "lunatick" or "moonstruck" (from the Greek selēniazomai), referring to seizures or ailments traditionally associated with lunar cycles.
https://thefirstchrist.org/#five
Diodorus Siculus, writing in the first century BCE, describes Medea creating an image of the goddess Artemis, filling it with powerful substances, disguising herself as an old woman, and carrying the image into the city. As the ritual unfolds, the people are overcome with divine fear and enter a state of ecstatic worship. Through this ceremony, Medea establishes herself not simply as a healer or priestess, but as the founder of a new sacred rite capable of transforming those who participated.