Koh Bon, Phi Phi Island: Manta Ray Cleaning Station

Diving Koh Bon means immersing yourself in one of the Andaman Sea's premier cleaning stations, a geological feature that consistently draws large marine life. From January to May, the site transforms into a bustling hub for manta rays (Mobula birostris), which frequent specific points to be cleaned by smaller fish. You position yourself discreetly, observing these graceful giants as they perform their almost choreographed passes, a truly humbling experience that defines the diving profile here.

Beyond the star attraction, Koh Bon offers a diverse underwater landscape. Its walls are extensively carpeted with vibrant soft corals, creating a vivid display of colour and texture as you drift alongside them. On the western side of the reef, hardy hard corals form intricate structures, providing shelter and foraging grounds for countless smaller inhabitants. This combination of soft and hard coral habitats ensures a rich tapestry of marine biodiversity from the shallows down the deeper sections.

The open water around Koh Bon is a hunting ground for an array of powerful pelagics. Keep an eye out into the blue for the sleek forms of tuna and wahoos, often seen patrolling the perimeter. The nutrient-rich waters that fuel the cleaning station's ecosystem also attract these formidable predators, adding an element of dynamic excitement to every dive. The presence of these larger fish reinforces Koh Bon's status as a site of significant oceanic activity.

Below the surface, the intricate reef system teems with life at every turn. You'll navigate through dense schools of reef fish, their collective movements creating shimmering curtains of silver and colour. Closer inspection reveals the hidden world of moray eels (Muraenidae), often peering from crevices, and the shy, intelligent gaze of octopuses (Octopus vulgaris) camouflaged against the rocks. This constant visual engagement, from the smallest nudibranch to the largest pelagic, ensures there is always something to capture your attention at Koh Bon.