Hydrocynus goliath

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Hydrocynus goliath

Sopra: un giovane esemplare; sotto: un adulto
Stato di conservazione
Rischio minimo[1]
Classificazione scientifica
DominioEukaryota
RegnoAnimalia
PhylumChordata
ClasseActinopterygii
OrdineCharaciformes
SottordineCharacoidei
FamigliaAlestidae
GenereHydrocynus
SpecieH. goliath
Nomenclatura binomiale
Hydrocynus goliath
Boulenger, 1898
Nomi comuni

Pesce tigre golia

Areale

Il pesce tigre golia (Hydrocynus goliath Boulenger, 1898) è un grosso pesce d'acqua dolce appartenente alla famiglia Alestidae.

Distribuzione e habitat

Questa specie è diffusa nelle acque dolci di grandi laghi e fiumi africani di Tanzania e Zaire: bacino idrografico dei fiumi Congo e Lualaba, nonché lago Tanganica e Upemba.

Descrizione

Particolare della testa con l'imponente dentatura

Presenta un corpo allungato, idrodinamico e compresso ai fianchi. La testa è allungata, gli occhi sono grandi, la bocca è ampia con mascelle provviste di 32 grandi denti appuntiti (in numero di denti varia in base all'età) di varie dimensioni (riesce a strappare anche il filo di acciaio delle lenze). Le pinne sono triangolari ed appuntite, la pinna caudale fortemente bilobata. La livrea presenta testa verde oliva, con corpo grigio argenteo e riflessi verdastri: le scaglie presentano poi piccole macchie nere formanti un reticolo o linee orizzontali brune. Le pinne sono trasparenti, tendenti al rossastro, la caudale è rosso vivo, orlata di nero. Il dimorfismo sessuale è sconosciuto.
Raggiunge una lunghezza massima di 133 cm, per 50 kg di peso.[2]

Riproduzione

Come per altri alestidi.

Alimentazione

Predatore, piscivoro.

Pesca

H. goliath è preda ambita nella pesca sportiva, ed è inoltre pescato per il commercio delle sue carni.

Acquariofilia

Allevato solamente da appassionati, necessita di vasche estremamente capienti.

Note

  1. ^ (EN) Moelants, T., Hydrocynus goliath, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020.
  2. ^ (EN) Hydrocynus goliath, su FishBase. URL consultato il 20 luglio 2014.

Altri progetti

Collegamenti esterni

  • Articolo Tiger fish, su acquariodolce.it. URL consultato il 29 dicembre 2013 (archiviato dall'url originale il 30 dicembre 2013).
  • (EN) Scheda su FishBase, su fishbase.org.
  • (EN) Galleria di immagini [collegamento interrotto], su 1x1.fi.
  • (EN) Notizie per l'allevamento in acquario, su seriouslyfish.com.
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