In HaitianVodou, Simbi (also Sim'bi) is a large and diverse family of serpent Loa (Vodoun spirit) from the West Central Africa / Kongo region. Some prominent Simbi Loa include Simbi Dlo (also Simbi d'l'eau - Simbi of the Water), Simbi Makaya, Simbi Andezo (Simbi of Two Waters), and Gran Simba. Traditionally in their Kongo context they are all associated with water, but in the Haitian Vodoun context they have wide ranging associations. For example Simbi Makaya is a great sorcerer, and served in particular in the Sanpwel secret societies. Simbi Anpaka is a Loa of plants, leaves, and poisons.
Milo Rigaud (City Lights, NY; c1969; "Secrets of Voodoo") speaks of Simbi as the Vodou Mercury, the messenger of Legba (the Sun). In this aspect Simbi is the bearer of souls to all places, and the creative principle.