Western Rocky

Western Rocky, near the archipelago's southern edge, concentrates Mergui's character into one cluster of limestone islets. The centerpiece is a tunnel passing clean through the main rock, a torch-lit corridor where tawny nurse sharks rest in the recesses and lobster eyes glitter from the ceiling cracks; divers exit into blue on the far side feeling they have been let in on something. Around the islets, walls and boulder slopes hold tigertail seahorses, harlequin shrimp, ornate ghost pipefish, and frogfish in densities that keep macro guides busy, while trevally and rainbow runners work the outside water. Night dives here rank with the region's best.

वह पल जिसके लिए आप आते हैं: The through-island tunnel with resting nurse sharks, elite macro walls, strong night diving

टोपोग्राफी: Limestone islets with a through-tunnel, walls, and boulder gardens

करंट: Current splits around the islets; the tunnel is dived on the quieter windows.

खतरे: A genuine overhead passage with surge on some tides; save it for days when the water agrees.

संरक्षण: The tunnel's residents tolerate polite traffic; lights out of eyes and no blocking of the exits.

Nitrox: यहाँ इसका फ़ायदा है — प्रोफ़ाइल उस रेंज में हैं जहाँ enriched air no-stop समय को सार्थक रूप से बढ़ाता है (इसके उपयोग के प्रशिक्षण के साथ)।