Longtail knifefish

Sternopygus macrurus

One Hundred Forty One Centimeters Sternopygid Fish

Longtail knifefish is a freshwater fish of South America. The species occupies freshwater habitats. The largest recorded length is 141 cm.

Class: Teleosts
Order: Neotropical Knifefishes
Family: Sternopygidae
Genus: Sternopygus
Maximum length: 141 cm
Water: Freshwater
Body shape: elongated
Distribution: South America: Magdalena River basin; entire extent of the Amazon and Orinoco River basins below approximately 500 m elevation including Napo River of western Ecuador and Madre de Dios River of Peru; all drainages of the Guianas Shield; Atlantic drainages of northeastern Brazil (Tocantins, Parnaíba, Pindaré, Itapicuru, and Salgado rivers); São Francisco River basin; Rio de Janeiro, Brazil; Paraguay-Paraná River basin.

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