Notopteroidei

Notopteroidei is a suborder of the order Osteoglossiformes that contains the extant families Gymnarchidae (aba), Notopteridae (feather backs and knifefish) and Mormyridae (elephantfishes), as well as several extinct taxa. The Mormyridae are weakly electric fishes, able to locate prey in turbid water.^[1][2][3]

Notopteroidei
Campylomormyrus tamandua
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Osteoglossiformes
Suborder:	Notopteroidei Jordan, 1923
Subgroups[1][2][3]
†Laeliichthys †Lopadichthys †Ostariostoma †Palaeonotopterus †Sinoglossus? Notopteridae (featherfin knives) Mormyroidea Gymnarchidae (aba) Mormyridae (elephantfishes)