The yellow/orange are females and the red is a male. Both when in the mood will have a jet black tail but only the male develops the red colouration. When he is displaying this is blood red but it’s very hard to photograph as the males prefer to hang out at the back of the tank. As @ mentioned they’re pretty rare so there’s not many photos of mature fish online. These are tank bred though so like many of the new tetras they’ll hopefully become more available soon. They’re pretty hardy and extremely beautiful once mature.A little confused; the pictures i see are like the yellow one; not the red ones with black tail. Is this a sex thing or are they two different species ?
Cheers
Last edited by a moderator: