Acestrorhynchus altus

Acestrorhynchus altus is a species of fish in the family Acestrorhynchidae. It was described by Naércio Aquino de Menezes in 1969. It inhabits the Amazon River basin, at a pH range of 5.5-7.2. It reaches a maximum standard length of 23.3 cm.

A. altus feeds off of bony fish.