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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.
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]
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.
They can have a lifespan of as long as ten years, [18] but normally just two to three years in an aquarium. [ 19 ] Neon tetras are considered easy to keep in an aquarium of at least 10 US gallons (38 L; 8.3 imp gal) with a temperature range of between 72–76 °F (22–24 °C), a water pH of between 6.0 and 7.0, GH of below 10 dGH and KH of 1 ...
The 100 species with longest life-spans recorded and verified [1]. This is a list of the longest-living biological organisms: the individual(s) (or in some instances, clones) of a species with the longest natural maximum life spans.
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.
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).
The rummy-nose tetra (Petitella rhodostoma) is a species of tropical freshwater characin fish originating in South America, popular among fishkeepers as a tropical aquarium fish. [2] One of many small tetras belonging to the same genus, it is on average 5 cm (2 in) long when fully grown. [ 3 ]