Search for sushi draining Mediterranean's red tuna stocks by Marie-Noelle Valles Mon May 29, 6:16 PM ET Too much demand for sushi from Japan may finish off stocks of red tuna running dangerously low in the Mediterranean owing to overfishing, say environmentalists from Greenpeace and the World Wildlife Fund (WWF). "Japan absorbs between 90 and 95 percent of catches of red tuna and the Mediterranean version is especially appreciated," explains Jose Luis Garcia, head of the WWF oceans section. The price of a prize red tuna can top 50,000 euros (60,000 dollars) on the Japanese market. "In opening new markets,...