1/23/2024 0 Comments Pristella tetraDuring the rainy season, the X-ray Tetra ventures into flooded marshlands of savannahs, where the water is softer and more acidic. You'll also find these mesmerizing fish in swamps and coastal rivers in Guyana, Suriname, Venezuela, and French Guyana. X-ray Tetras are endemic to the Orinoco and Amazon rivers in South America where it thrives in clear water tributaries and streams. With a proper setup and care, these Tetras can thrive and provide an eye-catching display in any aquarium. Their adaptable nature and ease of care make them an excellent choice for beginner aquarists. In summary, the X-Ray Tetra is a captivating and peaceful species that is well-suited for community aquariums. A gold variety of this species is also available. Additionally, they possess a bony internal structure called the Weberian apparatus, which is used to pick up sound waves, adding to their sharp sense of hearing. The species also displays a re-tipped tail and strikingly lined anal and dorsal fins that are black, yellow, and white. The scales are a yellowish-silver color, sometimes nearly golden in appearance. The X-Ray Tetra has a small, translucent body that allows you to see its backbone. Keep the lighting fairly dim to mimic their natural environment. Allow the wood and leaves to dye the water brown, replacing old leaves every few weeks to avoid fouling the water. Dried leaves can also be added for a more authentic feel, although aquatic plants are not a necessary feature of their natural habitat. For an optimal habitat, consider setting up a biotope environment with a sandy substrate, a few driftwood branches, and tangled roots. You can also house them with Corydoras Catfish and smaller Plecos. They are most compatible with other fish of similar size and temperament, such as other Tetras, Dwarf Barbs, Pencilfish, and Dwarf Cichlids like Apistogrammas. To ensure their best quality of life, it is important to keep these fish in groups of at least six, as they are a shoaling species. With their adaptable nature and easy-to-care-for requirements, these Tetras are a popular choice among hobbyists. The list below is incomplete.The X-Ray Tetra (Pristella maxillaris) is a fascinating and peaceful species that is well-suited for community aquariums, particularly for those just starting with fishkeeping. Since the aquarium trade may use a different name for the same species, advanced aquarists tend to use scientific names for the less-common tetras. Īlthough the list below is sorted by common name, in a number of cases, the common name is applied to different species. Ichthyologists debate the function of the adipose fin, doubting its role in swimming due to its small size and lack of stiffening rays or spines. While this adipose fin is generally considered the distinguishing feature, some tetras (such as the emperor tetras, Nematobrycon palmeri) lack this appendage. This adipose fin represents the fourth unpaired fin on the fish (the four unpaired fins are the caudal fin, dorsal fin, anal fin, and adipose fin), lending to the name tetra, which is Greek for four. Additionally, tetras possess a long anal fin stretching from a position just posterior of the dorsal fin and ending on the ventral caudal peduncle, and a small, fleshy adipose fin located dorsally between the dorsal and caudal fins. They ordinarily possess a homocercal caudal fin (a twin-lobed, or forked, tail fin whose upper and lower lobes are of equal size) and a tall dorsal fin characterized by a short connection to the fish's body. Tetras generally have compressed (sometimes deep), fusiform bodies and are typically identifiable by their fins. For example, payara ( Hydrolycus scomberoides) is occasionally known as the " sabretooth tetra" or "vampire tetra". Even vastly different fish may be called tetras. It is short for Tetragonopterus, a genus name formerly applied to many of these fish, which is Greek for "square-finned" (literally, four-sided-wing).īecause of the popularity of tetras in the fishkeeping hobby, many unrelated fish are commonly known as tetras, including species from different families. Tetra is no longer a taxonomic, phylogenetic term. Consequently, they are extremely popular for home aquaria. Many of these, such as the neon tetra ( Paracheirodon innesi), are brightly colored and easy to keep in captivity. The Characidae are distinguished from other fish by the presence of a small adipose fin between the dorsal and caudal fins. Tetras come from Africa, Central America, and South America, belonging to the biological family Characidae and to its former subfamilies Alestidae (the "African tetras") and Lebiasinidae. Tetra is the common name of many small freshwater characiform fishes.
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