Customs agents say they discovered a dolphin skull in luggage left at the Detroit Metropolitan Airport.

WSAV(CNN) - Customs agents seized $31 million worth of cocaine last week in Savannah, Georgia -- the largest cocaine seizure ever at the Port of Savannah. Officers found the cocaine, weighing 2,133 pounds, on a vessel from South America on October 29, US Customs and Border Protection announced Tuesday. When officers opened the container, they found 21 duffel bags containing a whopping 818 bricks of cocaine, the agency said. "I truly believe that we have disrupted these transnational organizations," said Christopher Kennally, Area Port Director Savannah, during a news conference Tuesday. Previously, the biggest cocaine seizure at the Port of Savannah took place in May, when officers seized 1,280 pounds of the drug.