Koh Chan, Pattaya: Reef Diving in Samae San's Islands

Koh Chan is situated about 10 kilometers south of Samae San Pier, part of the chain of islands at the southern end of Samae San. The island's geography allows for dives on either side, depending on prevailing winds and currents, providing sheltered options when conditions pick up. The dive typically begins with a descent onto the reef itself, following its contours as it slopes gently before dropping quickly at the deeper sections.

The southern and southeastern caps of Koh Chan present the most developed reef structures. Here you navigate along massive boulders that have detached from the cliffs above, now serving as anchors for extensive growth. These rocks are covered with gorgonian sea fans, whip corals, and a mix of hard and soft corals, creating a complex habitat where many species find shelter and feeding grounds. Focus your attention around these formations for smaller macro life.

The reef continues its descent, moving from a gradual slope to a more abrupt drop-off where the larger formations are found. This area, particularly the southeastern cap, is where you'll encounter a greater density of marine life due to the varied topography and the influences of stronger currents. Visibility here can range from 5 to 15 meters, offering clear perspectives on the reef's structure and its inhabitants.

Fauna observations at Koh Chan frequently include blue-spotted stingrays (Neotrygon kuhlii) resting on the sandy patches or cruising over the corals. Schools of yellow-tail fusiliers (Ceasiosoma spp.) are a common sight, often seen feeding in the active current areas, particularly around the cap. You'll also encounter lionfish (Pterois spp.) hunting along the reef, and the occasional blacktip reef shark (Carcharhinus melanopterus) patrolling the deeper sections.

The interior bay of Koh Chan is shallower and typically has little to no current, making it an ideal environment for newer divers to acclimate to open water conditions, or for snorkelers. This protected section still hosts a variety of smaller reef inhabitants, including nudibranchs, pufferfish, and clownfish (Amphiprioninae) within their anemones. Green turtles (Chelonia mydas) are also frequently present, sometimes found feeding or resting in the shallower beds.