Thetis Diving (特缔思潜水) is a PADI dive centre and marine science company based in Sanya, Hainan, China, operating at the InterContinental Haitang Bay Resort and Zhoushan Changqiao Ocean Park. Services include DSD scuba experience dives, snorkelling, fun dives for certified divers, underwater photography sessions, and PADI certification courses from Scuba Diver through Advanced Open Water, Rescue Diver and Freediver. Thetis is also an authorised distributor for BAUER, SCUBAPRO, CRESSI and MARES equipment.