second 1 looks to me like an albino .......Gymnocorymbus ternetzi (Boulenger 1895), the Blackskirt Tetra. To 6 cm. South America; Paraguay and Guapore Basins. pH 6-8, dH 5-19, temp. 20-26 C. A few "sports" of this species have been produced for the aquarium interest. Ones with no barring, some with no color whatsoever, longfinned varieties http/www.wetwebmedia.com/FWSubWebIndex/C...ngfinAlbino.JPG