This species is not listed on the IUCN Red List. The Pristella Tetra Pristella maxillaris was described by Ulrey in1894. Coldwater Fish - Looking for cold water fish? (65 °).Similar size fish - Fish that are 1 inch bigger or smaller.Community Fish - Peaceful Freshwater fish.Beginner Fish - Freshwater fish for beginners.For Information on keeping freshwater fish, see:įreshwater Aquarium Guide: Aquarium Setup and Care A school of 6 or more of these characins is really striking when maintained in a heavily planted aquarium. It's a very active schooling fish, so needs a 15 to 20 gallon aquarium, but is harmless to other fish and plants. It is a peaceful community member and is a fairly prolific breeder, though the tiny fry can be tricky to rear. ![]() The Pristella Tetra is easy to keep in other respects as well. However, this tetra will not get its full color in hard water or under bright light. A dark substrate and subdued lighting will show off the X-Ray Fish at its best and enhance its colors. It can even withstand very hard water, though it will do best in soft. In nature, it is found in brackish water as well as soft water. It is extremely hardy and undemanding and not at all choosy about water type. The Pristella Tetra is an excellent fish for the beginner. Then during the rainy season, it moves with the rising waters onto the savannah, where it spawns among the flooded vegetation. During the dry season it lives in streams and tributaries. In nature the Pristella Tetra inhabits the northeastern coastal waters of South America. This popular aquarium fish is the only species in the Pristella genus, and all specimens available in the hobby are commercially bred. Other common names that describe this beauty include Golden Pristella Tetra, Water Goldfinch, X-ray Tetra, and Pinktailed Tetra. A popular albino variety has also been developed that is more subdued in color overall, but has pink eyes and pink spots. Its dorsal and anal fins have white tips and a striking stripe pattern of a yellow stripe followed by a black stripe. It's known as the X-Ray Fish because its silvery yellow body is quite transparent. The list below is incomplete.The Pristella Tetra Pristella maxillaris is a very pretty little characin. 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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