A tetra species (Knodus sp.) with colorful fins that is new to science and was discovered on the RAP expedition to Alto Mayo, Peru. Related species are popular in the aquarium trade.

The neon tetra is the most famous and plentiful of all of the tetra species found in the ornamental fish trade. Each month, approximately 2 million neon tetra are sold in the U.S. alone.

Moreover, the highest number of fish (21%) in the middle Rio Negro basin region belong to this tetra species. ... consider if they'll be compatible with the new cardinal tetras.