![]() Predators and Prey Because tetra fish are so tiny, they have many predators.Īs tetras are small fish, many different predators hunt them. Most species generally have stable populations, although some have shown declines, while the numbers of the rest remain unknown.Īccording to the IUCN Redlist of endangered species, the tetra is considered least concern. They are primarily found in the freshwater rivers and lakes of the Amazon Basin. Tetras are found around the world, although they are concentrated in the previously mentioned areas. Distribution, Population, and Habitat Many types of tetra fish live in the Amazon River Basin. ![]() Colors are varied, ranging from silver and yellow to deep black. Males are usually thinner, while females are more rounded and tend to be larger. You’ll find a few differences between male and female tetras. Tetras have a small adipose fin between their dorsal and caudal fins, distinguishing them from other fish. ![]() The one exception is the genetically engineered glow tetra, which can grow up to six inches in size. Tetras are small fish, generally ranging in length from one to four inches. Appearance The neon tetra gets its coloration from guanine crystals found inside their cells that reflect off of light. The most popular tetras also have a low price in pet stores, making them affordable. Other popular tetra species among hobbyist fishkeepers include black, cardinal, rainbow, blue, flame, rummy-nose, emperor, and bloodfin tetras. ![]() Most pet stores sell neon tetras at a low price as they are plentiful. Although there are many different species, less than 20 are commonly found in aquariums worldwide. More than 150 species of fish considered tetras live worldwide. Species The black skirt tetra gets its name from its black, skirt-like fin. They usually live in regions rich with vegetation and shaded areas. Each species of tetra has its own unique range and distribution, but some species may inhabit the same areas. Tetras are native to South and Central America, Africa, and the Amazon Basin, except for the blind cave tetra that was found in Mexico. Many different types of fish are commonly referred to as tetras, even though they may not be related to each other. The word “Tetra” is derived from the Greek term “Tetragonopterus” which means “square-finned”. Tetra fish such as the neon tetra (Paracheirodon innesi) are popular amongst aquarium hobbyists due to their vivid colors and low-maintenance care requirements. The Characidae family is characterized by a small adipose fin located between the dorsal and caudal fins. These fish are native to Africa, Central America, and South America and belong to the Characidae family, as well as the two former subfamilies Alestidae (or African tetras) and Lebiasinidae. Tetra is a descriptive word used to refer to numerous species of small, freshwater characiform fish. Origins The small yet vibrant ruby tetra fares best in small groups of its own species. See all of our entertaining and insightful animal articles.
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