Chanda ranga: Lepidarchus Adonis Moenkhausia

Monday, 23 July 2012

Lepidarchus Adonis Moenkhausia

Lepidarchus Adonis
Moenkhausia

A tetra is one of several species of small freshwater fish from Africa, Central America and South America belonging to the biological family Characidae and to its former subfamilies Alestiidae (the "African tetras") and Lebiasinidae. The Characidae are distinguished from other fish by the presence of a small adipose fin between the dorsal and caudal fins. Many of these, such as the neon tetra (Paracheirodon innesi), are brightly colored and easy to keep in captivity. Consequently, they are extremely popular for home aquaria.

Tetra is no longer a taxonomic, phylogenetic term. It is short for tetragonopterus, the former genus name of this group of fish, which is Greek for "square-finned" (literally, square-winged).

Because of the popularity of tetras in the fishkeeping hobby, many unrelated fish are commonly known as tetras, including species from different families. Even vastly different fish may be called tetras. For example, payara (Hydrolycus scomberoides) is occasionally known as the "sabretooth tetra" or "vampire tetra".