The National Center of the Sea — Nausicaa, Aquarium and Centre for Scientific and Technical Culture, established since 1991 currently has 5 000 m³ of exhibition ponds, hosts 36,000 marine creatures and is an essential place to discover the fauna and flora of the marine world. A tool for economic development and attractiveness for the territory, Nausicaa has also become, nationally and internationally, an essential vehicle for pedagogy and recognised recognition of global knowledge of the oceans and the major challenges that lie ahead. In order to strengthen this development, it is now necessary to renew its visit path, increase its capacity to welcome and increase its attractiveness. In addition to improving the media library within the framework of the Learning Centre and the renovation of existing spaces and basins, the extension project foresees the creation of two new major attraction poles: — “in the country of the Polar Aurores”, comprising 4 basins for walruses and one basin for penguins, — “Aventure in the High Sea”, diving in the ocean and the abysses around the largest basin in Europe of almost 10.000 m³. The construction of these new spaces will lead to a doubling of the area of the equipment (from 25 466.58 m² to 45 995.08 m²) and to a total of 20.000 m³ of basins compared to 5.000 m³ today.