The Mato Grosso Arara of Brazil, numbering approximately 300 people, are Engaged yet Unreached. They are described as an Amazonian people of the Branco and Guariba river basins in Mato Grosso known to themselves as Yugapkata, whose unclassified ancestral language lost its last fluent speakers by the early 2000s They are an Indigenous people, with Arara (Karib) as their ethnic/kinship group and are in the Amazon people cluster of the Latin American and Caribbean Peoples. Their primary religion is Ethnoreligion. They primarily speak Portuguese.