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A neon tetra can appear slightly plump in the belly due to having overeaten. Neon tetras need dim lighting, a DH less than one, about 5.5 pH, and a temperature of 75 °F (24 °C) to breed. There also needs to be a lot of tannins in the water. Neon tetras are old enough to breed at 12 weeks. [23]
Paracheirodon tetras reach maximum overall lengths of 2.5 to 5 cm (0.98 to 1.97 in) depending on the species, and are of elongated, tetra shapes. All share a distinctive iridescent blue lateral line, but differ slightly in their other colorations.
Also, its body is slimmer than that of the neon tetra. It grows to a maximum overall length of about 3.5 cm (1.4 in). Like the other Paracheirodon species, the green neon tetra is kept as an aquarium fish, but it is less commonly seen than either the neon tetra or the cardinal tetra. P. simulans is also sometimes called the blue or false neon.
The black neon tetra (Hyphessobrycon herbertaxelrodi) is a freshwater fish of the characin family of the order Characiformes. [2] It is native to the Paraguay basin of southern Brazil . They are often found in the aquarium trade, and a feral population has been established in the rio Paraíba do Sul basin due to the trade.
Characidae, the characids or characins, is a family of freshwater subtropical and tropical fish belonging to the order Characiformes.The name "characins" is a historical one, [2] but scientists today tend to prefer "characids" to reflect their status as a, by and large, monophyletic group (at family rank).
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The primary host of Pleistophora hyphessobryconis is the neon tetra; however, this parasite demonstrates a broad range of host specificity and has been isolated from numerous species of aquarium fish. [3] P. hyphessobryconis primarily infects the skeletal muscle with no involvement of smooth or cardiac muscle. [2]
H. erythrozonus is a medium-sized tetra growing to 4 to 5 cm (1.6 to 2.0 in), notably larger than both neon and cardinal tetras. It has a life span of two to four years when kept in good conditions. In the wild, the fish eats aquatic insect larvae. [2]