Akuniya is the water deity of the Tlapanec (Me'phaa) of Guerrero, held to dwell in the La Ciénaga marsh. To this deity the people made offerings, formerly on the twenty-fifth of April, to call down the rains and secure the fertility of the fields; such observances have waned since the mid-twentieth century under the pressure of the Catholic mission. Bound to a single named place rather than to the cosmic genealogy of the Sun, the Moon and the Fire, Akuniya belongs to the localized water-and-rain dimension of Me'phaa religion and carries the domain-god element aku shared with the other Tlapanec deities below the dominant Sun-and-Moon pair.