Hua Hin Beach saw heightened activity on Sunday as locals flocked to catch fish unusually close to the shore due to the return of a natural phenomenon.
On 27th October, the “Namt Biead” phenomenon—commonly referred to as the “crowded water” —was observed along the coastline of Hua Hin in Prachuap Khiri Khan Province. The phenomenon, which was first reported this year on 21st October, caused a variety of marine animals to rise closer to the surface, attracting residents with nets, traps, and sieves. The activity stretched across a 7-kilometre section of the coast, from Suan Luang Queen’s Park (19 Rai) to Khao Takiab Village.
This occurrence is linked to recent heavy rainfall, along with water released from rivers and dams, which flows into the sea and disrupts the chemical balance of seawater. The influx of freshwater reduces oxygen levels, forcing marine creatures to surface in search of breathable water. Previous years have seen similar events, with fish occasionally washing ashore as oxygen levels in coastal waters plummeted.
In addition to beachgoers, local fishermen ventured out in their boats to catch crabs, fish, and other marine life. Some of the larger catches were sent to market, while others were prepared for meals at home. Tourists, both Thai and international, were also drawn to the scene, capturing photographs and sharing them widely on social media.
The phenomenon, also known as “Namt Biead-Namt Kan,” occurs when the mixing of freshwater and seawater triggers a sudden drop in oxygen concentration.
Although marine animals are forced to surface temporarily, the situation generally stabilises within a short period. Officials have confirmed that sea creatures caught during this event are safe for consumption.
Local authorities are monitoring the situation.