Considered sacred, tens of thousands of these fish in Thanh Hoa province, Vietnam, swim around a 100-meter section during the day and hide in caves at night.

Surrounded by limestone mountains, the fish swim through the clear 20-40 cm deep water.

Locals say the fish have been swimming there for hundreds of years and are treasured by many. Diseases have never attacked the fish, and locals never dare to touch them.

This location attracts thousands of tourists visiting yearly.

This magical fish stream is located in Cam Luong commune, Cam Thuy district, Thanh Hoa province, Vietnam, and was filmed on Sunday, December 6.

Surrounded by limestone mountains, the stream is only 100 meters long and 3-4 meters wide. There are tens of thousands of fish (weighing from 2 to 8 kg; the biggest ones are up to 30 kg). The stream is only 20-40 cm deep and the water is clear. Visitors can reach out to caress the fish.

Surprisingly, the fish swim around a 100-meter long section during the day and they hide in caves at night.

Locals say the fish have been there for hundreds of years and the people consider them as treasures. The fish have never been attacked by disease. The fish stream is sacred and nobody dares to catch the fish, according to locals.

This tourist attraction attracts thousands of visitors yearly.

This magical fish stream is located in Cam Luong commune, Cam Thuy district, Thanh Hoa province, Vietnam. The video was filmed on December 6.