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Recently, a mysterious sand island appeared on the coast of Taean, South Chungcheong Province. You can see them right after the moon or full moon every month, and the sand islands block the waves and serve as a spawning ground for the fish.

I'm Yongsik Lee.

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Hakam Beach is located in Taean Coast National Park.

Leaving the muzzle and entering the sea, a sand island appears in the middle of blue water.

At low tide, the sea level drops to an endless sea of ​​sandy islands.

This is the retreat of Chang'an caused by the accumulation of sand for many years.

The 35 km long, 4 km wide, up to 35 m high sandy island, traces of ripples on the fine sand, and the 'streak' are vividly added to the mystery.

The sand fields are clearly visible in the clear water.

[Jang, Tae-Su / Professor, Department of Marine Environment, Korea Maritime and Ocean University: Whether it's blue or algae, it transports sediments to make them elongate. The resignation was made three thousand years ago.]

The sandy islands above the water are a great shelter for cormorants and seagulls.

In the event of a typhoon or storm, it can block high waves and become a breeding ground for fish.

[Jeong-gu Choi / Taean Hagampo Fishermen: It is a great help for fishermen because it is a spawning ground for fish crabs or canaries.]

The underwater sandy island is about 3km from Hakpo, and it takes 20 minutes by boat.

Sand islands, which are usually submerged in water, can be seen for four days each month after the lunar or full moon.