Weakly electric fish

species of fish

species of fish

family of fishes

Mormyrus is a genus of ray-finned fish in the family Mormyridae. They are weakly electric, enabling them to navigate, to find their prey, and to communicate with other electric fish.

Sand knifefish are freshwater electric fish of the family Rhamphichthyidae, from freshwater habitats in South America.

Campylomormyrus is a genus of elephantfish in the family Mormyridae.

Petrocephalus is a genus of ray-finned fish in the family Mormyridae. All the fish species of this genus are endemic to Africa.

Boulengeromyrus is a monospecific genus of freshwater ray-finned fish belonging to the family Mormyridae, the elephantfishes. The only species in the genus is '''Knoepffler's elephantfish (Boulengeromyrus knoepffleri'''). It occurs only in the Ivindo River and the Ntem River basins of Gabon and Cameroon. It reaches a maximum length of about .

Brienomyrus is a genus of small elephantfish in the family Mormyridae from Africa. Usually available in the pet trade, these fish are commercially referred to as baby whales or baby whalefish.

Genyomyrus is a monospecific genus of freshwater fish belonging to the family Mormyridae, the elephantfishes. The only species in the genus is Genyomyrus donnyi which is endemic to the Congo River. It reaches a length of about .

Paramormyrops is a genus of elephantfish in the family Mormyridae from Africa.

species of fish

species of knifefish

species of fish

Stomatorhinus is a genus of small elephantfish in the family Mormyridae.

Isischthys is a monospecific genus of freshwater ray-finned fish belonging to the family Mormyridae, the elephantfishes. The only species in the genus is Isichthys henryi. It occurs in coastal river basins in West Africa, ranging as far southeast as the Kouilou-Niari River in Middle Africa. It reaches a length of about .

species of fish

species of fish

species of fish

Myomyrus is a genus of elephantfish in the family Mormyridae. Its members reach about in length and are restricted to the Congo River Basin in Africa.

species of fish

species of fish

species of fish

Oxymormyrus is a monospecific genus of freshwater ray-finned fish belonging to the family Mormyridae, the elephantfishes. The only species in the genus is Oxymormyrus boulengeri, which is found in the middle of the Congo River basin.

species of fish

species of fish

species of fish

species of fish

species of fish

species of fish

species of fish

Ivindomyrus is a genus of freshwater ray-finned fish belonging to the family Mormyridae, the elephantfishes. These fishes are found in rivers in Middle Africa.

species of fish

species of fish

Hyperopisus is a monospecific genus of freshwater ray-finned fish belonging to the family Mormyridae, the elephantfishes. The only species in the genus is Hyperopisus bebe. This species is known from many rivers in the northern half of Africa, ranging from the Senegal to the Nile basin. It reaches a length of .

The Mormyroidea (synonymy: Mormyriformes) are a superfamily (formerly an order) of fresh water fishes endemic to Africa that, together with the families Hiodontidae, Osteoglossidae, Pantodontidae and Notopteridae, represents one of the main groups of living Osteoglossiformes. They stand out for their use of weak electric fields, which they use to orient themselves, reproduce, feed, and communicate.

thumb|upright=1.2|A knollenorgan drawn by the German anatomist Viktor Franz, 1921. RC=receptor cell; b.m.= basal membrane; n=nerve. Line at top=skin surface.The organ is embedded in the skin of Mormyridae|mormyrid fishes, which actively electrolocate by generating brief electrical pulses with their electric organ. The returns from the pulses, distorted by any nearby objects such as prey, are detected by the knollenorgans distributed around the fish's body.

species of fish

Heteromormyrus is a genus of freshwater ray-finned fishes belonging to the family Mormyridae, the elephantfishes. These fishes are found in southern and central Africa in Angola, Namibia, the Democratic Republic of the Congo and, maybe, Zimbabwe.