Carcharhiniformes

>> Classification > Carcharhiniformes > Requin-marteau à aile blanche


Sphyrna couardi - Whitefin hammerhead - Weissflossen-Hammerhai - Cornuda aliblanca

Requin découvert par Cadenat en 1951.


Morphologie

 

Tête aplatie et élargie avec deux expansions latérales.
   
   
   
   

 

Caractéristiques
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  Taille Jusqu'à 300 cm.
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  Masse  
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  Nocturne/Diurne  
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  Alimentation Petits poissons osseux, crustacés.
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  Habitat  
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  Distribution
Eaux côtières et grand large de l'est de l'Atlantique.
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Maturité sexuelle

 
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Mode de reproduction

Vivipare.
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  Période de reproduction  
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  Espérance de vie  
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  IUCN Liste rouge NE
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Distribution
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Reproduction
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Dangers
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  Dangerosité

Aucune.

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  Degré
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  Exploitation humaine Aucune.
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Particularités
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  Les requins marteaux ont un champ de vision latérale meilleur que celui des autres requins, mais ils ne voient pas de face.
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  Les expansions latérales de la tête des requins marteaux présentent de nombreux avantages. On sait qu'elles élargissent le champ visuel du requin,
mais elles facilitent aussi sa nage en améliorant sa flottabilité, à la manière des ailes d'un avion. Pour tourner, il incline sa tête sur le côté.
Il se sert aussi de sa tête pour dénicher ses proies sur le fond de la mer et pour les plaquer au sol.
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Classification
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  Règne Animalia
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  Embranchement Chordata
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  Classe Chondrichtyes
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  Sous-classe Elasmonranchii
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  Super-ordre Euselachii
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  Ordre Carcharhiniformes
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  Famille Sphyrnidae
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  Genre Sphyrna
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  Espèce

Sphyrna couardi

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Photos
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Vidéos
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