Hydrocynus forskahlii  (Cuvier, 1819)

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

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Alestidae (African tetras)
Etymology: Hydrocynus: Greek, hydr = water + Greek, kyon = dog (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; pelagic; potamodromous (Ref. 51243).   Tropical (Ref. 5331)

Length at first maturity / Size / Weight / Age

Maturity: Lm 20.0, range 21 - ? cm
Max length : 78.0 cm SL male/unsexed; (Ref. 2880); max. published weight: 15.5 kg (Ref. 13337); max. reported age: 4 years (Ref. 2757)

Short description Morphology | Morphometrics

Diagnosis: 2 scale rows between lateral line and scaly process at pelvic-fin bases; eye <70% of interorbital space (Ref. 2880, 81279). Dorsal-fin uniformly greyish and its origin in front of pelvic fins; adipose fin greyish; caudal fin without black edge (Ref. 80290, 81279).

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

Africa: Lake Albert [=Lake Mobutu Sese Seko], Lakes Turkana and Gandjule (Margherita) (Ref. 5331), Nile, Omo and Congo (Ref. 2880, 5331, 81279, 80290). In West Africa reported from the Chad, Niger, Benoué up to the Gambia and Senegal basin; also present in the coastal basins (Ref. 2880, 81279). In Lower Guinea present Cross, Wouri and Sanaga basins (Ref. 80290).

Biology     Glossary (e.g. epibenthic)

Forms shoals; an open water predator often found near the water surface; feeds on fishes, preferring long bodied fish as they are easier to swallow and also takes insects, grass and snails; cannibalistic; preyed upon by fish eagle Haliaeetus vocifer; breeding migrations have been reported up several tributaries of Lake Kariba during the rains (Ref. 13337). Affinities: H. vittatus (Ref. 2880, 80290).

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

Main reference Upload your references | References | Coordinator | Collaborators

Paugy, D. and S.A. Schaefer, 2007. Alestidae. p. 347-411. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) Poissons d'eaux douces et saumâtres de basse Guinée, ouest de l'Afrique centrale/The fresh and brackish water fishes of Lower Guinea, west-central Africa. Vol. 1. Coll. Faune et Flore tropicales 42. Istitut de recherche pour le développement, Paris, France, Muséum nationale d'histoire naturelle, Paris, France and Musée royale de l'Afrique centrale, Tervuren, Belgique. 800 p. (Ref. 80290)

IUCN Red List Status (Ref. 96402)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial; gamefish: yes
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00490 (0.00196 - 0.01224), b=3.13 (2.90 - 3.36), based on LWR estimates for this (Sub)Family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.0   ±0.75 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.17-0.45; tmax=4).
Vulnerability (Ref. 59153):  Moderate vulnerability (39 of 100) .
Price category (Ref. 80766):   Unknown.