Lang Ong Nam Hai Festival has a history dating back hundreds of years, closely linked to the migration of fishermen from Central Vietnam to Phu Quoc to settle. Initially, the temple was just a small shrine built from simple materials. However, over time, the worship of Ca Ong (Whale God), brought from their homeland, gradually became a vital spiritual anchor for the fishing community during sea voyages.
In folk beliefs, Ca Ong (whales) is revered under the titles Nam Hai Dai Tuong Quan (Grand General of the South Sea) or Nam Hai Ngoc Lan Ton Than (Exalted God of the South Sea), serving as the guardian deity of the sea who guides ships through storms and rescues those in distress. When a whale washes ashore, local fishermen organize a solemn funeral, burying and worshipping it according to traditional rites. Today, Lang Ong Nam Hai still preserves several whale bone caskets, carefully maintained as evidence of the long-standing spiritual belief of coastal residents. Building upon this foundation, the festival was established as an annual whale-worshipping ritual, expressing gratitude and praying for a favorable, safe sea season for local fishermen.



