Petitella bleheri (Brilliant Rummynose Tetra) is a species of in the family tetras. They are associated with freshwater habitat. Individuals can grow to 3.6 cm.
Definition: length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. Simply put, this measurement excludes the length of the caudal fin