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The cardinal tetra is a very popular aquarium fish, but is less widespread than the neon tetra because until recently, it was difficult to breed in captivity. However, many breeders are now producing the fish; in most cases, one can determine if the cardinal tetra is bred or wild-caught due to damaged fins on wild-caught specimens.
The fish are also not caught by fish farmers during their breeding season. [9] The cardinal tetra, especially, is considered a renewable resource. [10] Project Piaba assesses the sustainability of the species farmed in the Rio Negro area by using the "F value" which estimates the portion of the catch from the total biomass. [11]
While rummy-nose tetras do not need their eggs to be kept in total darkness as is the case for neon and cardinal tetras, the eggs are known to exhibit some degree of photosensitivity, and subdued lighting is highly advisable during egg development in the breeding aquarium.
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]
Breed articles, at the present, exist only for goldfish. Most other fish breeds are not really qualified as seperate articles. The "gold severum" can be easily included in the severum article, just as the serpae tetra article can mention the long-finned strain. Breed articles use the breedbox instead of the taxobox. On the left is an example of ...
Cardinal tetra: Paracheirodon axelrodi: 5 cm (2.0 in) Similar to the Neon Tetra, but slightly larger and doesn't prefer to school as much. They need much larger tanks, although their temperament is similar. [31] Cave tetra, blind tetra: Astyanax mexicanus: 12 cm (4.7 in) The cave tetra is the blind cave form of the Mexican tetra.
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.
Breeding the Black neon tetra requires acidic water with no more than four degrees of hardness. [ 3 ] The black neon tetra is an egg scatterer, [ 3 ] laying adhesive (sticky) eggs over plants, etc. [ 7 ] One female can produce several hundred eggs.