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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.
All species of this genus are native to the Neotropical realm, occurring in the Orinoco and Amazon Basins in northern South America. 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.
Common names of fish can refer to a single species; to an entire group of species, such as a genus or family; or to multiple unrelated species or groups. Ambiguous common names are accompanied by their possible meanings. Scientific names for individual species and higher taxa are included in parentheses.
The bleeding heart tetra is distinguished by the small red spot on both sides of the fish. This fish is very prone to diseases, and can grow larger than most tetra species. [30] Bloodfin tetra: Aphyocharax anisitsi: 5 cm (2.0 in) Blue tetra: Knodus borki: 5 cm (2.0 in) Blueberry tetra: Hyphessobrycon wadai: 3.5 cm (1.4 in) Brittanichthys axelrodi
The green neon tetra (P. simulans) and black neon tetra (Hyphessobrycon herbertaxelrodi) are distinct species—the latter belongs to a different genus—and not color varieties. The cardinal tetra (P. axelrodi) is also a similar species, but its greater extent of red coloring distinguishes it from the neon tetra. [28]
Cardinal tetra; I. Neon tetra; S. Green neon tetra This page was last edited on 29 October 2023, at 18:55 (UTC). Text is available under the Creative ...
The Rio Negro region is the home of more than 100 different species of fish that are important to the pet fish trade. [4] In fact, several species, including cardinal tetras, show the adaptive trait of iridescence which may provide lower visibility in a blackwater environment. [4]
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 ]