Photograph of the Mata mata turtle taken circa 1911
Date 1911
Source National Geographic Magazine July 1911
Author Raymond L Ditmars
Source: https://commons.wikimedia.org/wiki/File:Mata_Mata_1911.jpg

The mata mata, mata-mata, or matamata (Chelus fimbriata) is a freshwater turtle found in South America, primarily in the Amazon and Orinoco basins. It is the only extant species in the genus Chelus.