Con dao Tourism

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Stunning beauty of Dam Tre Bay during seaweed bloom season

Dam Tre Bay, located on the northern side of Con Son Island, Con Dao, spans an area of 132 hectares. Sheltered from strong winds by surrounding mountains, the bay’s name—“Dam Tre” (meaning “Bamboo Lagoon”)—derives from the dense bamboo groves that cover these hills.
Stunning beauty of Dam Tre Bay during seaweed bloom season

The bay is renowned for its diverse marine ecosystem, and from March onward, as the seawater warms, sargassum (brown seaweed) begins to flourish. These seaweeds grow in underwater forests, with their stems anchoring to rocks or dead coral reefs, reaching up toward the sunlight. In the crystal-clear waters, the golden-brown sargassum sways with the waves, creating a mesmerizing, dreamlike underwater scene.


Sargassum serves as both a green lung and a shelter for marine life. The dense canopy offers a safe haven, breeding ground, and feeding area for numerous small sea creatures. It also stabilizes the seabed, reduces wave energy, and prevents coastal erosion. Through photosynthesis, sargassum absorbs CO₂ and releases oxygen, contributing to cleaner waters and ecological balance.

 The Dam Tre Bay tour, operated by Con Dao National Park, offers two options: a speedboat tour by sea and a hiking tour through the forest. The seaweed season typically lasts until June. During this time, besides enjoying activities such as stand-up paddleboarding (SUP), snorkeling, and spotting giant clams, visitors can immerse themselves in the cool, clear waters and marvel at the swaying seaweed forests, creating a majestic yet poetic natural spectacle.


 

Author: Xuan Da

Source: Bao Ba Ria Vung Tau. Translated by: Xuan Da::

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