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The Asian arowana (Scleropages formosus) comprises several phenotypic varieties of freshwater fish distributed geographically across Southeast Asia. [3] While most consider the different varieties to belong to a single species, [4] [5] [6] [3] [7] work by Pouyaud et al. (2003) [8] differentiates these varieties into multiple species.
At least five extinct genera, known only from fossils, are classified as osteoglossids; these date back at least as far as the Late Cretaceous.Other fossils from as far back as the Late Jurassic or Early Cretaceous are widely considered to belong to the arowana superorder Osteoglossomorpha.
Scleropages jardinii, the Gulf saratoga, Australian bonytongue, pearl arowana or northern saratoga, is a freshwater bony fish native to Australia and New Guinea, one of two species of fishes sometimes known as Australian arowana, the other being Scleropages leichardti.
The silver arowana (Osteoglossum bicirrhosum) is a South American freshwater bony fish of the family Osteoglossidae.Silver arowanas are sometimes kept in aquariums, but they are predatory and require a very large tank.
The black arowana is native to tropical South America where restricted to the Rio Negro basin, including the Branco River. [3] [6] [7] Black arowanas were discovered in the 1970s in the Orinoco basins, but whether this is a natural population or the result of introductions by humans is disputed.
Heterotis niloticus - MHNT. The African arowana or Nile arowana (Heterotis niloticus) is a species of bonytongue.Despite being called an "arowana", the African arowana is more closely related to arapaimas, the only other members in the subfamily Arapaiminae, than the South American, Asian, and Australian arowanas in the subfamily Osteoglossinae (Arapaiminae is sometimes considered to be a ...
Botia (Indian loaches) is a genus of freshwater fish in the loach family ().It was a large genus with about 20 species. In 2004 Maurice Kottelat proposed in his paper (along with the description of Botia kubotai, see References below) to divide the genus into four related genera based on fish appearance and locality:
Chitala is a genus of fish of the family Notopteridae.This genus contains six species, some of which are important in aquaculture and the aquarium industry. They are commonly known as the Asian knifefishes or featherbacks.