The vagaries of ecology make it hard to pinpoint one single cause, but after the BP oil spill last summer, this year's shrimp crop in the Gulf of Mexico has been extremely bad. Other issues, such as the drought in the US and spring flooding transported by the Mississippi River to the Gulf, make identifying the culprit tricky. And guess what? BP says that the harvest this year is "within the historical range of variability." In other words, stuff happens. It sure does!