Acnodon oligacanthus (Müller & Troschel, 1844)
Acnodon oligacanthus
photo by Dubosc, J.

Family:  Serrasalmidae (Piranhas and pacus), subfamily: Myleinae
Max. size:  20 cm TL (male/unsexed)
Environment:  benthopelagic; freshwater, potamodromous
Distribution:  South America: North Guiana Shield rivers.
Diagnosis:   
Biology:  The diameter of the eyes suggests a crepuscular activity for this species. The inferior position of the mouth facilitates easy access to benthic plants like Podostemaceae and other fruits, seeds and flowers that fall into the water. The juveniles live in small creeks with sandy substrate. Between 5-10 cm, they migrate to large rivers where they form shoals along the river banks and sandy beaches of shallow waters. Thereafter, they appear to lead a more solitary existence in the central beds of rivers (Ref. 12225).
IUCN Red List Status: Least Concern (LC); Date assessed: 02 January 2021 Ref. (130435)
Threat to humans:  harmless


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