"Rising sea temperatures are killing mussels in Spain's Ebro delta and shellfish output is also suffering from Greece to Canada". "EBRO DELTA, Spain - Mussel farmer Xavier Cabrera held out a handful of dry, dead mussels from his shellfish farm on the coast of the Ebro Delta, 100 miles (160 km) south of Barcelona. "Let's hope this isn't our future," he said ruefully. A summer