The French architect Jacques Rougerie has designed a floating, manta-ray-shaped vessel for marine researchers, scientists and students. The oceanic city is called Mériens (which translates roughly to “City of Oceanites”) and can house up to 7,000 people. It is 3,000 feet long and will include research laboratories, classrooms, living quarters and leisure spaces, Tech Insider reports.

It’s also environmentally friendly and completely sustainable, running off marine renewable energy and wind power. Rougerie claims the floating city will produce no waste, either, and will be used as the main base for his other mobile research vessel, Seaorbiter