The black neon tetra (Hyphessobrycon herbertaxelrodi) is of typical elongated tetra appearance; it is of plain basic coloration but with two distinct, adjacent longitudinal stripes, white above black. The eye has two thin but distinctive color bands across the top, red above yellow. It grows to a maximum overall length of approximately 4 cm (1.5 in). Despite its common name, it does not particularly resemble the neon tetra, which belongs to a different genus.