Gymnotus jonasi Albert & Crampton, 2001

Family:  Gymnotidae (Naked-back knifefishes), subfamily: Gymnotinae
Max. size:  13.5 cm TL (male/unsexed); max.weight: 4.0 g
Environment:  benthopelagic; freshwater
Distribution:  South America: Amazon River basin, Brazil.
Diagnosis:  Electric organs present.
Biology:  Recorded from root mass of floating meadows in the whitewater floodplains of the TefĂ© region where it is common although patchy in distribution. Adults both breed and forage in the meadows and are never encountered in other floodplain habitats such as flooded forests. Both juveniles and adults feed on small aquatic animals, especially chironomid larvae (Ref. 41292).
IUCN Red List Status: Least Concern (LC); Date assessed: 01 March 2007 Ref. (130435)
Threat to humans:  harmless


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