Scientists have discovered that large fish, which include many of the sharks, rays and skates of Europe, are the most at threat from extinction. Marine fish play important roles in marine ecosystems, but are also a major food source for marine and terrestrial mammals, most notably humans.

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Scientists have discovered that large fish, which include many of the sharks, rays and skates of Europe, are the most at threat from extinction. Marine fish play important roles in marine ecosystems, but are also a major food source for marine and terrestrial mammals, most notably humans.