Big Bubble is a PADI Five-Star Instructor Development Dive Resort on Koh Tao, Thailand, established in 1994. The school offers a full range of PADI scuba courses from beginner Discover Scuba Diving and Open Water certification through Advanced, Rescue and professional Divemaster training, plus PADI specialty courses (Enriched Air/Nitrox, Wreck, Deep, Peak Performance Buoyancy, Side Mount, Self-Reliant) and a complete PADI freediving line from Basic to Advanced Freediver. Instruction is delivered by PADI-certified instructors in small groups with a maximum 4:1 student-to-instructor ratio. On site the resort has a bar, restaurant and beachfront bungalows, and runs its own dive boats for a one-stop diving experience.