Leonardo DiCaprio has gone to Twitter to protest the selling of shark fins in New York City restaurants. Last Friday, DiCaprio tweeted: “We did it in Cali. C’mon #NewYork! RT @Oceana. Time is running out for bill banning trade of #sharkfins.” DiCaprio has been a vocal part of the movement to put an end to the shark fin trade in the past. Previously, he wrote a letter to the California Senate in support of a bill that would ban the sale of shark fins in the state. The bill was passed into law in October 2011. Toronto also banned the sale of shark fins in October 2011, as have the states of Hawaii, Washington and Oregon. Shark fin soup, a popular delicacy in Chinese cuisine, is traditionally considered a sign of wealth. The fins are virtually tasteless and hold no nutritional value. Shark fin soup is a key reason why one-third of the world’s open-ocean shark species are now threatened with extinction. Rob Stewart, director and star of Sharkwater estimates that 100 million sharks are killed annually for their fins. Sharks are an apex predator. Other high-profile shark advocates include Yao Ming, Paul Watson, Gordon Ramsay and Richard Branson. ~Emily Davies