Apteronotidae

Sternarchogiton nattereri

Sternarchogiton nattereri

Mature males grow external jaw teeth

• Tropical
• Southern Hemisphere
• Regional distribution
• Freshwater fish
• South America
• Medium
• Tropical fish

Sternarchogiton nattereri is a species of weakly electric knifefish in the family Apteronotidae. It is native to the Amazon River system and feeds on sponges. Unlike other members of the genus Sternarchogiton, there is pronounced sexual dimorphism in S. nattereri, with reproductively mature males developing strong external teeth on tips of their jaws.