Classification
Animalia [kingdom]Chordata [phylum]
Vertebrata [subphylum]
Gnathostomata [superclass]
Teleostei [class]
Osteoglossomorpha [superorder]
Osteoglossiformes [order]
Osteoglossoidei [suborder]
Osteoglossidae [family]
Heterotidinae [subfamily]
Arapaima [genus]
Arapaima gigas [species]