Experience Grand Cayman's Bioluminescence Bay on a fully private night tour: just your group, your captain, and water that glows with every movement. Cruise into Bio Bay after dark and watch the water light up around your hands, every splash sparking blue-green light. Your captain explains the science behind the glow and shares the best ways to see it at its brightest. A relaxed two-hour evening on the water that works for all ages, and the perfect way to end a day in Cayman or follow up your daytime charter. Private groups up to 10.