The cardinal tetra is a freshwater fish of the family Characidae of order Characiformes. It is native to the upper Orinoco and Negro Rivers in South America. Growing to about 3 cm (1.2 in) total ...

In the December 2009 issue of PFK, Heiko Bleher wrote about the habitat of the Rummynose tetra (Hemmigrammus bleheri). My biotope project aquarium is too small for a large shoal of these fish, but I ...