What Is a Black Tetra?
The black tetra is a freshwater fish native to Paraguay and is usually found in the upper layers of basins. It is a popular fish for tropical aquariums. The are small fish, typically only growing to about 2.5 inches (6 cm) in length, and are often seen in groups of five or more. At birth the black tetra is a dark black color, but as it ages the blackness fades into a duller gray, with a pair of dark vertical stripes complimenting its light color. The dorsal and anal fins of the black tetra are large in comparison to its body. These large fins give the appearance of a “skirt” on the fish, which is why many refer to the fish as a black skirt tetra.
