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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.
In fact, several species, including cardinal tetras, show the adaptive trait of iridescence which may provide lower visibility in a blackwater environment. [ 4 ] Project Piaba started with an ecological baseline study of the region which was conducted in 1989 by a group of researchers and students from the Universidade do Amazonas (UA) and the ...
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.
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.
The cardinal tetra, Paracheirodon axelrodi, was named for Axelrod. For his philanthropy, the Smithsonian Institution named Axelrod their 1999 Donor of the Year. [15] Axelrodia, a genus of characin from South America, is named for him. [2] A number of fish species are also named for him, including
Vietnamese cardinal minnows do best in a water temperature ranging from 19–23 degrees Celsius. Softer water within the range of 37–142 ppm is also preferable. They are peaceful, though males constantly challenge one another, harmlessly, and do well with a variety of fish, such as cyprinids , catfish , loaches , and tetras .
Discus and cardinal tetras in an Amazon River basin display at the Palais de la Porte Dorée aquarium in Paris Large public aquariums sometimes use aquascaping as part of their displays. As early as the 1920s, the New York Aquarium included a moray eel display tank that was decorated with calcareous tufa rock, arranged to resemble a coral reef ...
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.