Jellyfish

Jellyfish at the Similan Islands offer a mesmerizing experience for divers and snorkelers, adding an enchanting element to the underwater world. These graceful, translucent creatures are commonly found in the nutrient-rich waters of the islands, especially from October to May, when jellyfish sightings are more frequent due to increased plankton levels. Their movements, floating with the currents, create a surreal underwater landscape that fascinates visitors.

Several types of jellyfish inhabit the Similan Islands, each with unique colors, shapes, and sizes. Moon jellyfish, with their delicate, rounded forms, are a frequent sight and generally harmless. Box jellyfish, although less common, are also found here, and divers are advised to maintain a safe distance, as some varieties can sting.

Jellyfish are integral to the Similan Islands' ecosystem. As both predators and prey, they help balance marine life by feeding on plankton and small fish while providing food for larger species like sea turtles. Their presence also indicates healthy water conditions, making them essential to monitoring ocean health.

By observing jellyfish responsibly—keeping a safe distance and wearing protective clothing—visitors can enjoy an unforgettable encounter with these mysterious creatures, enhancing their appreciation of the Similan Islands’ marine biodiversity.