All Fresh Water Fish

African arowana

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New Fish Tank Tips: Get an aquarium filter that has multiple (2) media cartridges. This will allow you to change out one at a time. If you swap out all of the filter media with new media you run the risk of having to go through a mini aquarium cycle. Good power filters that hang on the back of the tank usually come with a separate floss system that you never have to change.

Contents of this page belong to The African arowana, Heterotis niloticus, is a member of the arowana family. Despite being called an “Arowana”, the African arowana is more closely related to Arapaima gigas, the only other member in the subfamily Heterotidinae. The only plankton-feeding osteoglossid, the African arowana has a more terminal mouth than other species of arowana (Osteoglossum and Scleropages).

Like the other Osteoglossids, the African arowana is a long-bodied fish with large scales, long dorsal and anal fins set far back on the body, and a rounded caudal fin. Its height is 3.5 to 5 times Standard Length (SL). It has been reported to reach up to 100 cm (39 in) SL and weigh up to 10.2 kg (22 lb).

This fish is gray, brown, or bronze in color. Coloration is uniform in adults, but juveniles often have dark longitudinal bands.

African arowanas have air-breathing organs on its branchiae, enabling them to survive in oxygen-depleted water. A suprabranchial organ allows it to concentrate small planktonic food particles and also has a sensory function.

This species is widespread throughout Africa, where it is native to all the watersheds in Sahelo-Sudanese region, Senegal, and Gambia as well as parts of eastern Africa. This range includes the basins of the Corubal, Volta, Ouémé, Niger, Bénoué, and Nile Rivers as well as those of Lake Chad and Lake Turkana. It has been successfully introduced to Côte d’Ivoire, the Cross River in Nigeria, the Sanaga and Nyong rivers in Cameroon, and Ogooué River in Gabon, as well as the lower and middle Congo River basin, including Ubangui and Kasaï Rivers. It has also been introduced in Madagascar. In some cases, introduction is reported to have had a negative impact on the local ecology.

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