Payaras

Hydrolycus is a genus of large dogtooth characins from tropical South America, where found in the Amazon and Orinoco basins, as well as rivers of the Guianas. The genus includes the largest dogtooth characins, reaching up to 1.17 m (3.8 ft) in length. They have long, pointed teeth (shorter and less extreme in H. wallacei) used for spearing their prey, generally smaller fish. In a study of the stomachs of 45 individuals, most were empty, but among the...