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Osteoglossiformes

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Osteoglossiformes

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Osteoglossiformes
Osteoglossum bicirrhosum
 
Osteoglossum bicirrhosum
Scientific classification
Kingdom: Animalia
 
Phylum: Chordata
 
Class: Actinopterygii
 
Order: Osteoglossiformes
 
Families
Gymnarchidae
Heterotididae
Mormyridae (elephantfishes)
Notopteridae (featherfin knives)
Ostariostomidae (extinct)
Osteoglossidae (arowana)
Pantodontidae (butterflyfishes)
Singidididae (extinct)

Osteoglossiformes (Lat. "bony tongues") is a relatively primitive order of ray-finned fish that contains two sub-orders the Osteoglossoidei and the Notopteroidei

Members of the order are notable for having toothed or bony tongues, and for having the forward part of the gastrointestinal tract pass to the left of the oesophagus and stomach (for all other fish it passes to the right).

One species, the arapaima (Arapaima gigas) is the largest freshwater fish known, with specimens reported up to 4.5 m in length.

The mooneyes (Hiodontidae) are often classified here, but may also be placed in a separate order Hiodontiformes.

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This guide is licensed under the GNU Free Documentation License. It uses material from the Wikipedia.


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