[2] The black morpho tetra is a small finned fish.

The fish typically reaches 40 - 50 mm in length, although they have been recorded growing as large as 4 cm.

[1][3] The black morpho tetra demonstrates significant sexual dimorphism, with males growing longer and more colorful dorsal and anal fins.

[4] Unlike many other small characids, the black morpho tetra does not form schools.

They may have difficulty competing for food with more voracious tank mates.