Diamond Tetra (Moenkhausia pittieri) are a larger tetra species, characterized by their long fins and impressive iridescent scales.
These tetras are larger, reaching 2.5 inches in length. They area shoaling species, and thus should be kept in groups of 3+. They live for 4 years on average and do best in temperatures in the mid 70's to low 80's. Because these tetras are larger, a small shoal should be kept in a minimum tank size of 20 gallons.
These fish can live with other peaceful community fish and are typically no threat to snails and most shrimp species. They tend to get outcompeted in aquariums with semi-aggressive tankmates.
Photo of a Diamond Tetra by User:A,Ocram - Own work, CC0, for Wikipedia (English).