Sun comes out from eastern mountains. Tourists hang around in front of tanks and interact with marine biologists. At the end of a day, sun sets at the western mountains and visitors leave aquarium. We found out there are something different between day time and night time. We would like to share with you! Just because of this simple reason, we who love ocean start to plan sleep over in aquarium. Using some spaces to make equipments and design many funny activities to get closer with marine biologists. Feel it by yourself and try to find the secret at night in NMMBA. That’s why “Sleep over in NMMBA” was born.