"That is a lot of fish, including a lot of commercially viable fish and a lot of endangered fish, to kill year in, year out," said Jon Rosenfield, science director at the environmental watchdog San Francisco Baykeeper.
Delta pumps likely killed over half a million fish in two decades. This year was extra deadly yahoo.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from yahoo.com Daily Mail and Mail on Sunday newspapers.