Dive site · Koh Nang Yuan
Calm pinnacles on white sand, home of the famous saddleback anemonefish.
Twins sits just off the west side of Koh Nang Yuan, the postcard triple island next to Koh Tao. Despite the name there are actually three rock formations here: two main granite pinnacles and a smaller, deeper cluster further out, all rising from bright white sand between 5 and 18 metres.
Calm water, easy depths and almost no current make Twins one of Koh Tao's main training sites, where thousands of Open Water students log their first proper dives. That doesn't make it boring: the sand channels and boulders hold blue-spotted stingrays, moray eels, angelfish, parrotfish and nudibranchs, and there's plenty for a fun diver to explore.
Its most famous residents live in a sandy patch near the middle pinnacle: a family of saddleback anemonefish, rare in these waters, that every divemaster on the island can find with their eyes closed. A short swim away sits Buoyancy World, an artificial reef of purpose-built structures around 12 metres where divers fine-tune their buoyancy.
Just off the west side of Koh Nang Yuan, minutes from Koh Tao by boat. It pairs naturally with Japanese Gardens on the other side of Nang Yuan for a two-dive morning.