The San José and two of its fellow ships subsequently engaged in a cannon battle with their enemies while most of the fleet retreated to Cartagena. The key pieces of evidence were dozens of rough gold coins sitting on the ocean floor. The images were so detailed that experts even noted the distinct engravings made by an assayer, the person responsible for testing the gold coins’ purity. Along with the tons of additional currencies, gems, and historical artifacts, the San José represents one of the most lucrative shipwreck finds in modern history. For now, the fate of the San José remains unclear.