The sea goddess in Slavic mythology is known as Marzanna. She is associated with elements of nature, particularly the transitioning of the seasons from winter to spring. Marzanna embodies themes of death, rebirth, and the cyclical nature of life, signifying the end of winter and the arrival of new growth. Rituals surrounding Marzanna involve casting her into water, symbolizing the cleansing of the old year to make way for renewal and fertility, illustrating the interconnectedness of seasonal change and ecological balance in Slavic culture.