Petitella is a genus of freshwater fish in the family Characidae of the order Characiformes.

They are all popular tropical fish in the aquarium hobby.

They are commonly known as Rummy-nose tetras.

This genus was formerly monotypic, featuring only P. georgiae.

Before the reallocation in 2020,[1][2] they were distinguished by the following common names: There are three recognized species in this genus:[3]