Ly Son island district has dozens of tombs of whales. The tomb named Lang Tan in An Vinh Commune has been recognized a national cultural and historical relic site by the Ministry of Culture, Sports and Tourism. This is the home for many of the largest old whale skeletons in Vietnam.

In April 2014, while fishing in the waters of the Truong Sa (Spratly) Islands, Captain Truong Minh Ky discovered a dead whale 12 meters long, 6 tons in weight. He took the dead fish to Ly Son Island for burial.

The local authorities used a specialized crane to take the dead fish onshore to bury with special rituals.

The whale skeleton will be dug up for worship after five years.

This whale skeleton is 20 meters long. Locals said this skeleton is almost 300 years old.

Vietnamese fishermen believe that whales rescue people in danger at sea and can bring them a prosperous fishing season. They consider whales as the Nam Hai god and sea gods for protecting and supporting them in their daily lives and at sea.

Lang Tan is currently preserving three giant whale skeletons.

The islanders annually donate money to preserve the whale skeletons at whale tombs.

Every spring, local fishermen organize rituals to worship the whales.