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Hydrolycus scomberoides by OpenCage.jpg
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Cynodontidae
Genus: Hydrolycus
(J. P. Müller & Troschel, 1844)

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.[1] They have long, pointed teeth used for spearing their prey, generally smaller fish. The genus includes the largest dogtooth characins, reaching up to 1.17 m (3.8 ft) in length.[1]

In 1999 two species were described, the first in this genus in 158 years.[1]


There are currently four described species.[1]


  1. ^ a b c d Froese, Rainer, and Daniel Pauly, eds. (2017). Species of Hydrolycus in FishBase. January 2017 version.