South Korean officials have freed a large gray shark trapped for over a month in a canal in Busan. On Wednesday, they used a floating platform to guide the 3-meter-long dusky shark, nicknamed Bukangi, to the sea. The shark was first spotted in mid-September and became a tourist attraction, drawing over 1.7 million visitors. Previous attempts to free it failed. Experts were concerned about its health due to lack of feeding and falling water temperatures. The operation involved maneuvering a platform and using nets to prevent the shark from returning. It's unclear how far the shark swam out.