NEW ORLEANS (AP) — An area in the Gulf of Mexico with too little oxygen to keep sea creatures alive is the 11th largest measured and nearly 18 percent bigger than predicted earlier this year. It has gotten so big because heavy June rains throughout the Mississippi River watershed carried nutrient-rich runoff from farms and other human activities into the gulf, federal and state scientists said Tuesday. Those nutrients, mainly nitrogen and phosphorus, feed algae and other one-celled plants that die and fall to the bottom, where their decomposition uses up oxygen.