Hyphessobrycon agulha (also known as the red-tailed flag tetra) is a species of tetra in the family Characidae. As a freshwater fish, it inhabits the basin of the Madeira River in Brazil along with parts of Peru and Bolivia, and it reaches a maximum length of 4.3 centimetres (1.7 in).[2] Though it is mainly found in the wild, it is occasionally kept by fishkeepers[3] and is sometimes confused with the neon tetra.[4] The fish is primarily an insectivore, though it does eat vegetable matter.[5] It is considered to form a group with other species in Hyphessobrycon as they share a dark stripe running lengthwise.[6]
While its name comes from the native name for this species along the Madeira River in Brazil,[7] the fish also occurs in Colombia and Peru.
^Ho, Leonard (14 April 2017). "A new tetra fish from Columbia". Advanced Aquarist. Pomacanthus Publications. Archived from the original on 1 December 2017. Retrieved 26 November 2017.
