Ichthyology A New Species of Sexually Dimorphic Electric Knifefish Rossella 2013-04-17 Rossella · April 17, 2013 0 1.9k 0 A New Species of Sexually Dimorphic Electric Knifefish from the Amazon Basin, Brazil (Gymnotiformes: Apteronotidae) Tags:aqua International Journal of IchthyologyaquapressElectric Knifefishheiko bleher'new speciesSexually Dimorphic