Call the royal kingfish, kingfish-moon, salmon gods or Lampris guttatus, if the Latin scientific classification dépayse you; or Opah, favorite name of his fans, especially those in the Hawaiian restaurants, enjoy its fine flesh. This is a unique species it is. The first warm-blooded fish. An American team describes in the journal Science of 15 May, the amazing thermal regulation system that makes this animal so far little known real incongruity, coupled with a formidable predator of the deep.
The major discovery appears as the boundary between the classes seemed firmly established. On one side mammals and birds, the other fish. Warm blood for some, cool for others. Or rather constant body temperature – almost – for the first; variable, depending on that of water, for the latter. The reason is simple: the heating value of the liquid element. At the same temperature, loses twenty-five times more heat in water than in air, and a man immersed in a sea dies at 10 ° C in an hour and a half.
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