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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]
Hemigrammus erythrozonus, commonly known as the glowlight tetra, is a small tropical fish from the Essequibo River, Guyana, South America. It is silver in colour and a bright iridescent orange to red stripe extends from the snout to the base of its tail, the front of the dorsal fin being the same color as the stripe.
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).
Neon tetra: Paracheirodon innesi: 3.75 cm (1.48 in) Neon tetras must be kept in groups of at least a half-dozen, as they are a shoaling species. With peaceful dispositions, they are also able to be kept with other species of non-aggressive fish. [36] 38 L (10 gal) [36] 68 to 79 F (20 to 26 C) [36] 6.0–7.0 [37] Ornate tetra: Hyphessobrycon bentosi
During the 1940s and 1950s, White Cloud Mountain minnows acquired the nickname, the "Poor Man's Neon Tetra", because they were much more affordable in price than the colorful and then expensive neon tetras. [9] Two variants are commonly available: the "Golden Cloud" and the longer-finned "Meteor Minnow", which can be gold as well.
A Green neon tetra with the lack of red stripe clearly visible. This fish loses its brilliant blue and red colors when lights are switched off, but regains them when lights are switched on again. The green neon tetra comes from extremely soft, acidic water at temperatures around 24 to 29 °C (75 to 84 °F).
Other common names include goldfinch tetra, a reference to the similarly coloured goldfinch, and pristella tetra, a modification of its Latin name. A common name that was once widespread but is now rarely used is signal tetra, a reference to the similarity between the yellow and black dorsal fin and the arm of a semaphore railway signal.
The flame tetra (H. flammeus) is bred in large numbers in captivity and common in the aquarium trade, but rare in the wild. [5] </ref> [6]Most of the species in the genus have not been rated by the IUCN Red List as Threatened, but many species have small distributions and at least three, H. flammeus, [5] H. coelestinus and H. duragenys are classified as endangered. [7]