First, the species has a semi-transparent silvery coloring that immediately stands out from other tetra varieties like ember ...

It may not have been the most beautiful tank, but the sudden appearance of a Kuhli loach or Red-tailed black shark through the vegetation, or the bright colour of a Neon tetra flashing in the light ...

Not so, as these cichlids grow large, eat small fish like Neon tetras and become aggressive and territorial when breeding. Red tail black sharks and Ruby sharks are strikingly coloured and provide ...