Pristobrycon striolatus

Pristobrycon striolatus inhabits mainly black or acidic waters in tributaries in the Orinoco and Amazon River Basins.

This small and beautiful fish reaches 10–30 centimetres (3.9–11.8 in). Its body is discoid with the anterodorsal profile slightly curved or straight. The head is robust and wide. Its snout is blunt. A preanal spine is absent. The adipose fin is wide. The head is silver with metallic orange to red at the mandibular and opercular regions. Its iris is yellow. Its body is greenish laterally and a mixture of orange and red at the abdominal area, covered with "pepper-like" spots. It has a single spot in the opercular area above the pectoral fin origin. The fins have reddish tones. Its caudal fin has an angled basal black band.[1]

Like other piranhas, P. striolatus is a predator, consuming smaller fish and attacking fins. Juveniles eat aquatic insects and crustaceans (shrimps). Occasionally, its diet includes fruits from the surrounding gallery forest. This is a solitary, non-schooling species.