Southwest Pinnacle, a series of rock formations ranging from 4m to 30m and is another of Koh Tao's top ten. The tops of the pinnacles are covered with a carpet of anemones in brilliant greens, pinks and blues, with their cavalcade of pink anemone fish. Leopard sharks and whale sharks are occasional visitors to the site, which is home to large schools of snapper, yellowtail barracuda, as well as fusiliers.
Large groupers can be seen here as well, along with scribbled filefish and masked porcupine fish. The observant diver may spot scorpion fish and stonefish camouflaged on the rocks.