Tetra fish usually refers to the family Characidae, but there are also types of tetra fish that belong to other families. These include:
(Characidae) – Tetras are a group of freshwater fish from South America and Central America. They typically inhabit slow-moving and still waters like rivers, streams, lagoons, and lakes. The Characidae family includes over two hundred different species with many more subspecies. There exist numerous different sizes, colors, and temperaments among them all, making them among the most varied types of aquarium fish currently in existence. Many tetras have a detailed torpedo-shaped profile characteristic of their streamlined bodies, which enable them to swim quickly through the water.
(Cyprinidae) – This family, which is very large and widespread, includes both the smaller types of carp and the larger breeds known for their ornamental value. These fish have a variety of common names, including goldfish, koi, and weather loaches. One of the most popular types of tetra fish kept in aquariums is those belonging to the genus Barbus, referred to as “tinfoil barbs.” Many Cyprinids are known for being peaceful community tank residents but can also be aggressive. There is a strong demand for unusual specimens among this group due to their vibrant colors. For example, some Barbs have stripes while others have spots.
(Gonorynchidae) – Also known as the “Kneriidae,” these types of tetra fish are found in Africa, and they inhabit slow-moving upland rivers, pools, floodplains, and small lakes. These are generally surface-dwelling creatures that feed on algae and invertebrates, which they scoop up along with the water using their specialized teeth.
Their bodies are laterally compressed, making them relatively easy to distinguish from other types of tetra fish. They have a flap of skin attached below their lower jaw, an Oral Disc, which works in conjunction with their simple but effective U-shaped digestive tract to process any prey item they happen to ingest rapidly. The most popular species in this family is the “Kneria breviceps” or “Owillis”.
(Poeciliidae) – These are among the most popular types of tetra fish since they are readily available at pet stores. They are very hardy and easy to care for, so they are pretty popular with novice aquarists. Many of these species have adapted to life in shallow pools that lack significant water flow. Their offspring develop inside the female’s body rather than in a distinct brood pouch like other types of tetra fish. Notable examples include members of genus Poecilia which is also known as the “guppy” or Micropoecilia species, such as “M. Ramirez” or “Blue Ram.”
(Characidae) – The Characidae family is among the most prominent fish families in the world. The different species are grouped into subfamilies based on their characteristics. One of the most popular types of tetra fish kept in aquariums is those belonging to the genus Hemigrammus, known as “Hemigrammus erythrozonus” or, more commonly, Neon Tetras.
These hardy species adapt readily to new environments, provided they are properly acclimated. They have small yet effective teeth that facilitate eating algae and other plant material found in freshwater habitats throughout South America while also foraging for small invertebrates during the night.
(Cichlidae) – These types of tetra fish are among the most well-known and popular types in the hobby today. They are found in almost all tropical regions throughout South America, Africa, and Asia, where they inhabit a wide range of different habitats. Cichlids come from several families and many genera, including Astronotinae, Etroplus, Haplochromis, and Ptychochromoides.
Some species, such as Discus, may reach up to two feet long, while others, such as those belonging to genus Apistogramma, can be less than an inch in length. Types of cichlid fish vary greatly, and this causes members of different species to differ significantly in temperament. For example, some cichlid fish are highly aggressive, while others do much better when kept as a single specimen within an aquarium.
Tetras are a group of freshwater fish from South America. This particular one is called a neon tetra, and it gets its name from the bright blue/green color on its scales.
Neon tetras are a popular pet because of their vibrant colors and peaceful nature. They’re generally easy to care for, but they do need to be kept in small schools of at least five fish. This is because neon tetras are very social fish, and in the wild, they’re found in huge groups where there are at least fifteen fish. If you only have one or two neon tetras, they won’t feel comfortable and may become very stressed.
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