Black Phantom Tetra

CHARACTERISTICS

The black phantom tetra (Hyphessobrycon megalopterus), or simply phantom tetra, is a small freshwater fish of the characin family (Characidae) of order Characiformes. It is native to the upper Paraguay basin and upper Madeira basin (including Guaporé, Mamore and Beni) in Brazil and Bolivia. It is commonly seen in the aquarium trade.

While it is not particularly colorful, it makes up for this by its display behavior: the males are territorial and defend their space against their neighbors by presenting themselves in profile with the dorsal and anal fins fully extended, and the dark color intensified, making the edging of the body patch stand out prominently. Sometimes they exchange blows which can tear the fins, but this damage heals quickly. Unlike other tetras who prefer to live in large shoals, they will also do fine when kept in a group of four or five individuals, making them suitable for smaller aquaria. They still need enough space for the males to stake territories and present themselves to best effort, however.