Sabertooth Payara (Hydrolycus armatus) 4-6 inch
H. armatus are overall silvery. In adults the base of the tail and anal fin is pale yellowish, and the distal part is blackish, contrasting with a narrow white edge at the very tip (unique among Hydrolycus species).
A typically reported maximum total length of this fish is 89 cm (2.92 ft), but records show specimens up to 95 cm (3.12 ft) in Venezuela and more than 100 cm (3.3 ft) in Brazil. It typically weighs up to 8.5 kg (19 lb), but can reach almost 18 kg (40 lb).It has frequently been confused with the generally smaller H. scomberoides. H. armatus reaches maturity when at least 30 cm (1 ft) long. Like other dogtooth characins, it has very long pointed canine teeth. In H. armatus these can surpass 5 cm (2 in) in length in large individuals. These are used for spearing their prey, usually other fish.