Yemọja
Yemọja (also: Yemaja, Yemanjá, Yemoyá, Yemayá; there are many different transliterations in other languages) is a major water spirit from the Yoruba religion. She is the mother of all Orishas. She is an orisha, in this case patron spirit of rivers, particularly the Ogun River in Nigeria, and oceans in Cuban and Brazilian orisa religions. She is often syncretized with either Our Lady of Regla in the Afro-Cuban diaspora or various other Virgin Mary figures of the Catholic Church, a practice that emerged during the era of the Trans-Atlantic slave trade. Yemọja is said to be motherly and strongly protective, and to care deeply for all her children, comforting them and cleansing them of sorrow. She is said to be able to cure infertility in women, and cowrie shells represent her wealth. She does not easily lose her temper, but when angered she can be quite destructive and violent, as the flood waters of turbulent rivers.
Yemọja is often depicted as a mermaid, and is associated with the moon (in some diaspora communities), water, and feminine mysteries. She is the protector of women. She governs everything pertaining to women; parenting, child safety, love, and healing. According to myth, when her waters broke, it caused a great flood creating rivers and streams and the first mortal humans were created from her womb.

Name variants
Yoruba: Yemọja, Yemaja, Iyemọja, Yemọnja, Iyemọnja, Iyemẹja or Yemẹja in some Yorùbá dialect variants
Portuguese phonetic spellings of Brazil: Yemanjá, Iemanjá, Janaína, Mãe da Água
Spanish phonetic spelling of Cuba, Puerto Rico, and other Spanish speaking countries: Yemojá, Yemayá, Yemallá>
French terms for mermaid spirits: La Sirène, Mère de L'Eau
Pidgin/Creole Languages: Mami Wata
Trinidad Orisha: Yemonjá

Africa
In traditional Yoruba culture and spirituality, Yemọja is a mother spirit; patron spirit of women, especially pregnant women; She is the patron deity of the Ogun river (Odò Ògùn) but she has other rivers that are dedicated to her throughout Yorùbáland. In addition, she is also worshipped at almost any stream, creek, springs in addition to wells and run-offs. 
Her name is a contraction of the Yoruba words Iye, meaning "mother"; ọmọ, meaning "child"; and ẹja, meaning "fish"; roughly translated the term means "mother of fish children". This represents the vastness of her motherhood, her fecundity, and her reign over all living things. 
The river deity Yemoja is often portrayed as a mermaid, even in West Africa, and she can visit all other bodies of water, but her home and the realm she owns are rivers and streams, especially the Ogun River in Nigeria.
River deities in Yorubaland include Yemo̩ja, Ọ̀ṣun (Oshun), Erinlè̩, Ọbà, Yewa, etc. It is Olókun that fills the role of sea deity in Yorubaland, while Yemoja is a leader of the other river deities.

Americas
In West Africa, Yemoja is worshipped as a high-ranking river deity, but in Brazil and Cuba she is worshipped mainly as a sea/ocean deity.

Brazil
In Candomblé and Umbanda Yemanjá is one of the seven Orixás. White roses are used as a ritual offering. She is the Queen of the Ocean, the patron spirit of the fishermen and the survivors of shipwrecks, the feminine principle of creation, and the spirit of moonlight. Saturday is the consecrated day of Yemanjá.
Colors: light blue and crystal
Ritual garment color: light blue
Ritual jewelry or necklace: crystalline beads
Ritual salutation: Odô-Iya, Erù-Iya, Odôfiaba
Symbols: shells, sea stones

Syncretism
In Brazil, Yemanjá is syncretized with Our Lady of Navigators (Nossa Senhora dos Navegantes) and Our Lady of the Conception (Nossa Senhora de Conceição).

Sacred objects
Sacred objects associated with Yemanjá that are placed in the pegi, the room or space dedicated to an orixá, include:

Dishes and porcelain
Earthen basins
Fruits: obi (Cola acuminata) and the bitter kola nut (Garcinia kola)
White jars or pitchers
White medals or coins

Ritual sacrifice
Guinea fowl, ducks, hens, she-goat are sacrificed ("orô") on festival days associated with Yemanjá in the Candomblé tradition. Animals sacrificed to Yemonja must be thrown in the water for their disposal.

Ritual foods
Angu, manioc or maize flour boiled in water or milk
Corn meal
Lelé, a drink of white corn meal boiled in coconut milk
Obi, the fruit of Cola acuminata
Onion, referred to as alubaça
Rice
White corn

Festivals
In Salvador, Bahia, Iemanjá is celebrated by Candomblé on the same day consecrated by the Catholic Church to Our Lady of Seafaring (Nossa Senhora dos Navegantes). Every February 2, thousands of people line up at dawn to leave their offerings at her shrine in Rio Vermelho. Gifts for Iemanjá include flowers and objects of female vanity (perfume, jewelry, combs, lipsticks, mirrors). These are gathered in large baskets and taken out to the sea by local fishermen. Afterwards a massive street party ensues.
In Pelotas, Rio Grande do Sul State, on February 2, the image of Nossa Senhora dos Navegantes is carried to the port of Pelotas. Before the closing of the Catholic feast, the boats stop and host the Umbanda followers that carry the image of Iemanjá, in a syncretic meeting that is watched by thousand of people on the shore.
Iemanjá is also celebrated every December 8 in Salvador, Bahia. The Festa da Conceição da Praia (Feast to Our Lady of Conception of the church at the beach) is a city holiday dedicated to the Catholic saint and also to Iemanjá. Another feast occurs on this day in the Pedra Furada, Monte Serrat in Salvador, Bahia, called the Gift to Iemanjá, when fishermen celebrate their devotion to the Queen of the Ocean.
In São Paulo State, Iemanjá is celebrated in the two first weekends of December on the shores of Praia Grande city. During these days many vehicles garnished with Iemanjá icons and colors (white and blue) roam from the São Paulo mountains to the sea littoral, some of them traveling hundreds of miles. Thousands of people rally near Iemanjá's statue in Praia Grande beach.
On New Year's Eve in Brazil, millions of Brazilians, of all religions, dressed in white gather on the  beaches to greet the New Year, watch fireworks, and throw white flowers and other offerings into the sea for the goddess in the hopes that she will grant them their requests for the coming year. Some send their gifts to lemanjá in wooden toy boats. Jumping seven waves is also common. Paintings of lemanjá are sold in Rio shops, next to paintings of Jesus and other Catholic saints. They portray her as a woman rising out of the sea. Small offerings of flowers and floating candles are left in the sea on many nights at Copacabana.

Cuba
In Santería or regla de ocha, Yemayá is the mother of all living things as well as the owner of the oceans and seas.
Colors: There are many roads to Yemayá, Okute, Asesú, Achabá and Mayelewo are some of them, and each one has a color combination having all blue as a common denominator.
Ritual garment color: Blue.
Ritual number: Seven.
Ritual jewelry or necklace: Seven blue beads followed by seven crystalline beads.
Ritual salutation: Omío Yemayá
Symbols: Shells, sea stones, fish, fishnets, anchors, everything that pertains to the sea.

Ritual sacrifice
When ducks, roosters and rams as four-legged animals.

Ritual foods or adimús
Cane syrup, called melado in Spanish.
Watermelon.
Malarrabia, a Cuban dessert.
Gofio, flour made from roasted grains.
Pork rinds.

Festivals
In Havana, Cuba, Yemayá is celebrated on the 7th of September. There is a procession in the municipality of Regla, home of Our Lady of Regla Church, which takes place around that date, which is a tradition that was initiated by slaves Cabildos and their descent, namely Susana Cantero -Omí Toké- and Pepa Herrera -Echu Bí-.  
It is common for regla de ocha initiated priests and priestess to keep a vigil for Yemayá on September 6th which is called vísperas.

Uruguay
In Montevideo, worshippers gather on Ramírez Beach in the Parque Rodó neighborhood every February 2 to celebrate Iemanjá Day. Hundreds of thousands sit waiting for the sunset before they launch small boats with offerings into the ocean.
In 2015, the Uruguayan government estimated that 100,000 people had visited the beach for the celebrations.

In popular culture
In Smite, Yemoja is a playable character, part of the Yoruba pantheon.
In the fifth episode of the third season of American Gods, Bilquis is enlightened by Yemoja.
In Ishmael Reed's Mumbo Jumbo, the character Earline is supposedly possessed by Yemanjá.
During the Miss Universe 2016 beauty pageant, Miss Venezuela Mariam Habach wore a national costume entitled "Reina encantada del mar", inspired by the myth of Yemayá. The costume, which weighed more than 18 kilos and was made of 120 meters of organza with hundreds of pearls and crystals, was so huge that it hampered her movements and forced her to constantly kick her dress forward, to the point that she got stuck in the fabric and had to be assisted off stage.
In the 2021 fantasy novel Skin of the Sea by Natasha Bowen, Yemoja is the creator of the Mami Wata.
In the song "Think of You" by French-Cuban musical duo Ibeyi, the lyrics include mention of orishas Moyuba Oshun Shango and Yemaya. The song "Yemaya" by Alfredo Rodriguez and featuring Ibeyi is named for the spirit.


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