Derek voiced concern about the future survival of various species of sharks, which are being captured and de-finned for shark fin soup, considered a rare delicacy in Asia and in the United States.
"It's very difficult to know how many there are left in the world," Derek said. "Some studies show that in the past 20 years, they're down 90 percent. They reproduce very slowly. I think that unless people just stop eating the (shark fin) soup, I don't think the species has a chance."
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