when was this organization established?
5 October 1948
International Union for Conservation of Nature
IUCN was established on 5 October 1948
what is a porbeagle? It is a species of mackerel shark in the family Lamnidae where is it found? Marine waters of the North Atlantic and Southern Hemisphere what is their food? Bony fishes, pelagic fishes such as lancet fish, mackerel, pilchards, herring, and sauries are the second fish a threatened species? Yes,  the International Union for Conservation of Nature (IUCN) produced the first red list for threatened oceanic sharks and rays.
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International Union for Conservation of Nature [SEP] Establishment
IUCN was established on 5 October 1948, in Fontainebleau, France, when representatives of governments and conservation organizations spurred by UNESCO signed a formal act constituting the International Union for the Protection of Nature (IUPN). The initiative to set up the new organisation came from UNESCO and especially from its first Director General, the British biologist Julian Huxley. At the time of its founding IUPN was the only international organisation focusing on the entire spectrum of nature conservation (an international organisation for the protection of birds, now BirdLife International, had been established in 1922.)