The term 'Reef Explorer's Gear' is related to SCUBA, which stands for Self-Contained Underwater Breathing Apparatus. SCUBA is a type of gear used by reef explorers to explore underwater environments. It consists of a breathing apparatus, such as a mask and regulator, and other equipment, such as fins, tanks, and weights. This gear allows divers to explore the depths of the ocean and observe the unique and diverse marine life that inhabits coral reefs.