But Arkin has been selling shares since 2008, and now confirms that he only has about one-fourth of his initial Perrigo stake, worth a quarter of a billion dollars.

FORBES: Pharma Kingpin-Turned-VC Mori Arkin Joins Billionaires' Club

Many sharks perish as bycatch, but increasingly they are being hunted for their fins, a delicacy in China and a lucrative commodity. (The annual export of fins is thought to be worth about a billion dollars.) One study, published in Ecology Letters last year, estimates that between twenty-six million and seventy-three million sharks are killed for their fins every year.

NEWYORKER: Neptune��s Navy