There are no sharks in Ha Long Bay. The bay is home to a variety of other marine life, including fish, dolphins, and turtles, but sharks are not one of them. The water in Ha Long Bay is also too shallow for most sharks to live in. The deepest part of the bay is only about 100 meters, and most sharks prefer water that is at least 1000 meters deep.
The only sharks that have ever been found in Ha Long Bay were a few small sharks that were washed up on shore. These sharks were likely not native to the bay, and they probably died after being trapped in the shallow water.
So, if you are planning a trip to Ha Long Bay, you don’t need to worry about sharks. The bay is a safe place to swim, kayak, and boat. Just be sure to follow all safety instructions from your tour operator.