The Mexican Navy has found nearly 2000 pounds of cocaine inside a shipment of frozen sharks shipped to Mexico from Costa Rica.

Mexican Navy inspectors in the south eastern port of Progreso, in Yucatan state were using X-ray scanning equipment to look inside two cargo containers on Tuesday when they detected something that didn’t look right. The inspectors opened the containers, cut open some of the frozen sharks and found bricks of cocaine wrapped in dark plastic.

The ship carrying the cargo containers of cocaine filled sharks was called the Dover Strait and the containers were loaded in Costa Rica.