Two days ago last weekend, Mr. Vu Thanh Sang (21 years old, Hanoi) had a short trip to Ha Long City, Quang Ninh. He and his friend chose to stay in Bai Chay area but rented a motorbike to move to Hon Gai area to sightsee, sightsee and eat.
He said: "On the evening of May 17, after dinner, we drove around the city. After that, we stopped at Hon Gai beach, specifically on Column 8 street, to walk along the beach together, breathing in the fresh air in the evening.
At first, when we saw the pink red coastline, we were quite surprised because we had never seen this phenomenon before. There were a few people nearby talking and calling it the bright algae. Curious, I tried using snail shells to touch the small pink red puddles remaining on the sand to see the interesting green light."
Returning home, Mr. Sang shared his story with friends, in which some people living in Quang Ninh were surprised to see this phenomenon for the first time. The next morning, when talking to local customers at Ha Long market, the male tourist received the answer that due to the erratic weather change, he would occasionally encounter this phenomenon.
Although living and growing up in Quang Ninh, Ms. Doan Thi Huong Giang (32 years old, Quang Ninh) has never encountered this phenomenon in her hometown. Seeing the information shared a lot on social networks, Ms. Giang also wanted to " discover" this interesting phenomenon herself.
She said that at around 8:30 p.m. on May 18, she went to Hon Gai beach, near the shower area. She stayed for nearly an hour and saw that this area attracted a lot of people in the evening.
"When I got to the beach, I touched the algae like touching the water normally. But when I took the water with my hand, I saw the blue light emitted like a superman (laughs), especially many children were very excited," she shared.
At midnight on May 18, Ms. Tran Thu Thao (32 years old, Quang Ninh) and her friends also went to see this phenomenon directly. Knowing that the information was shared from the afternoon until the night, this phenomenon still existed, Ms. Thao and her group of friends also went to Hon Gai beach to directly explore.
Ms. Thao said: "I have never seen this phenomenon even though I live near the sea. Late at night, the beach is still crowded with people coming out to see and experience. Everyone shouted with excitement and took a lot of photos, even many people spent quite a while under the sea.
When we arrived, although the algae were almost gone, I and many people still went to find the sand dunes that had accumulated to play. That feeling is interesting, I touch it and feel the liquid as soft as jelly."
After returning home, both Ms. Giang and Ms. Thao did not have any health problems after touching the phenomenon of flare-ups.
Previously, the enthusiastic travel community was delighted by the image of the beach around Cat Ba Island (Hai Phong) lit up at night. This is a famous place for hunting for snakehead fish, also known as bioluminescence, with blue light.
When affected by physical movement, these creatures will glow in dark, calm seas and little artificial light. This phenomenon usually occurs in the summer, from May to August, when the weather is dry.
This phenomenon is caused by a photosynthesized algae species called Noctiluca scintillans. N. scintillans algae do not produce toxins, and do not pose a danger to humans. However, dense algae can deploy oxygen in seawater, threatening ecosystems.
