Sous la surface

Mardi 24 août 2010 à 17:34

    Eh oui, parce que l'océan n'a pas fini de nous étonner voici un poisson des plus étranges...Attention..présentation!
Alors vous allez me dire qu'il y a une étrange ressemblance avec votre prof d'espagnol de quatrième (perso c'est ce que j'ai pensé lol) mais non il s'agit bel et bien d'un poisson que l'on appelle le Blobfish

Le blobfish est un poisson abyssal que l'on trouve aux larges des côtes Australiennes et Tasmaniennes à une profondeur comprise entre - 600 et -1200 mètres! Autant dire que vous n'avez aucune chance d'en croiser un en allant à la plage.

Pour supporter l'immense pression qu'il y a à de telles profondeurs (cent fois supérieure à celle de la surface!!), ce poisson a une chair principalement constituée d'une masse gélatineuse dont la densité est plus faible que celle de l'eau, ce qui lui permet de flotter au-dessus du fond de l'océan sans avoir à dépenser la moindre énergie pour nager. Le blobfish a donc très peu de muscles. Il ne possède presqu'aucune arête et est recouvert de mucus (bon appétit bien sûr!). Il se nourrit de neige marine mais aussi de petis mollusques

Pour la p'tite histoire...

Comme de nombreux poissons des profondeurs, il est souvent pêché par le chalutage de fond. Et comme il n'est pas comestible et que sa masse gélatineuse se dessèche en quelques minutes, les pêcheurs s'en débarrassent immédiatement. Problème supplémentaire, son rythme de reproduction est très lent. Certains nids ont été découverts, ils comportent de 9.000 à 108.000 œufs roses, mais peu arrivent à échapper aux prédateurs.

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