A video posted by a park official in Krabi showed more than 100 Black Tip Reef Sharks coming in to feed.
The spectacle was in the area of Koh Hong part of the Thanbok Khoranee National Park.
The sharks were between one meter and 1.5 meters in length said Sanook and lingered for about 30 minutes.
The media said this showed the health of the eco-system in the area
