Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopteri (ray-finned fishes) > Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Hyperopisus: Greek, yper = over, up + Greek, pisos, -eos, ous = a wet place. More on author: Lacepède.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; brackish; demersal; potamodromous (Ref. 51243). Tropical; 22°C - 24°C (Ref. 12468)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Africa: all Sahelo-Sudanese river basins (Ref. 81274); including Senegal River, Gambia River, Niger River, Volta River, Ouémé River, Ogun River and Chad basin (Ref. 2915). Also in Nile River basin, up to Albert and Murchison Niles (Ref. 3203).

Length at first maturity / Size / Weight / Age

Maturity: L_m 33.0 range ? - ? cm
Max length : 51.0 cm SL male/unsexed; (Ref. 2915); max. published weight: 1.0 kg (Ref. 3799)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 12-16; Anal spines: 0; Anal soft rays: 52 - 71. Spots on adults only; body depth 3.9-6.2x SL; head length 4.6-6.2x SL; head in 1.6-2.3x longer than wide; base of anal fin 4-7.7x longer than dorsal fin base; the pectoral 1.1-1.7x head length; ventral 2x shorter pectoral; caudal peduncle is 1.5-3.6x its length.

Inhabits both still and flowing waters, breeds in the flood season. Feeds on mollusks (Ref. 28714). Possesses electroreceptors over the entire head and on the ventral and dorsal regions of the body, but absent from the side and the caudal peduncle where the electric organ is located (Ref. 10011). Its electric organ discharge (EOD) is steroid-sensitive (Ref. 10763; 10764). Fecundity value of 18,924 eggs has been reported for this species (Ref. 10607).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Bigorne, R., 1990. Mormyridae. p. 122-184. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux saumâtres d'Afrique de l'Ouest. tome 1. Faune Trop. 28. Musée Royal de l'Afrique Centrale, Tervuren, and ORSTOM, Paris. (Ref. 2915)

IUCN Red List Status (Ref. 123251)

Least Concern (LC) ; Date assessed: 23 October 2019

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial

FAO(Publication : search) | FishSource |

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Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82805): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01175 (0.00687 - 0.02010), b=2.81 (2.66 - 2.96), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 3.6 ±0.50 se; based on food items.

Resilience (Ref. 120179): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).

Vulnerability (Ref. 59153): Moderate to high vulnerability (47 of 100) .

Price category (Ref. 80766): Unknown.

Hyperopisus bebe (Lacepède 1803)