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ArowanaHeterotidinae
Osteoglossinae Arowana are freshwater bony fish of the family Osteoglossidae, sometimes known as "Bony tongues". Classification They are primitive throwbacks from the lower Tertiary and are placed in the actinopterygiid order Osteoglossiformes. Seven described species remain: three from South America, one from Africa and the remaining three from Australia. Habits Most are entirely carnivorous, often being specialized surface feeders. They are excellent jumpers and it has been reported that Osteoglossum species have been seen leaping more than 6 feet from the water surface to pick off monkeys from overhanging branches in South America. All species are large, and the Arapaima is a contender for the world's largest fish. Species The family contains two subfamilies, Heterotidinae and Osteoglossinae, with all but two of the seven extant species being members of the latter. - Subfamily Heterotidinae
- Genus Arapaima
- Genus Heterotis
- Subfamily Osteoglossinae
- Genus Osteoglossum Cuvier, 1829
- Genus Scleropages
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