We know that sharks and rays are enormously threatened. The numbers are staggering. Recent studies estimate that at least 100 million sharks are caught and killed each and every year, mostly for their fins in unregulated or illegal fisheries.

In Palau, a country that depends critically on underwater tourism, studies showed that a dead shark is worth $108 -- but a single live shark is worth $1.9 million over the course of its lifetime.

It's time for GrubHub to join other companies that have already banned shark fin products, like Disney, Amazon, Hilton, Marriott and the Starwood hotel group, and take action to protect sharks before it's too late.

About 1.1 billion people, or 15 percent of the human race, depends upon killing our living planet for their daily livelihood.