Shark trapped in South Korean city won't return to sea

Key points

• An endangered dusky shark named Bukangi has been trapped in a canal in the South Korean port city of Busan for almost a month. Authorities have made three attempts to guide her back to the ocean, including a large operation on Wednesday, but she swam back into the canal.
• The oceans ministry says she is in stable condition, though officials are concerned she has not been feeding regularly. A researcher suggests giving her about a week to leave on her own.
• Her popularity has drawn more than 1.6 million visitors to the city.