Mun Nai Jetty

Mun Nai Jetty is a beginner-friendly dive site near Koh Mun Nai in the eastern Gulf of Thailand, where a jetty structure provides an artificial reef environment at a maximum depth of just eight meters. This shallow, sheltered site offers easy diving perfect for introductory experiences and training in the warm Gulf waters near the Rayong coast. The jetty pilings create vertical surfaces that marine organisms have colonized, transforming the man-made structure into a functional reef. Barnacles, mussels, and soft corals coat the pilings, while the spaces between them create shelter for fish and invertebrates. The shallow depth and calm conditions make the site ideal for newer divers, with plenty of marine life to observe at comfortable, stress-free depths. Fish aggregate around the jetty structure in numbers that demonstrate the power of artificial habitat in the Gulf. Schools of snappers and fusiliers orbit the pilings, while reef species patrol the encrusted surfaces. The sandy bottom around the jetty base harbors blue-spotted stingrays and various gobies, adding diversity to the compact dive area. Mun Nai Jetty offers a pleasant, accessible dive experience that showcases how even modest artificial structures can support thriving marine communities. The combination of easy conditions, reliable marine encounters, and the fascinating process of watching nature colonize human infrastructure makes it a worthwhile stop for divers exploring Thailand's eastern Gulf coast.