Considered one of the most beautiful seas in the world, the small Mediterranean hosts in its waters an incredible biodiversity and species unique to the world's sea inhabitants. Fish, gorgonians, corals, algae and plants such as posidonia that cover the Mediterranean seabed with extensive prairies, mollusks with sculpture-like shells, urchins and starfish, crustaceans and other animals color the pages of this book, presenting to the curious eyes of readers the great biological variety of our sea, which is manifested in the large plates dedicated to the main underwater environments such as prairies, reefs carpeted with gorgonians or caves. The pages devoted to the recognition of organisms are enhanced by special sections that tell the story of the Mediterranean and the biological basis that makes it so special and fascinating. Selected YouTube videos, also accessible by QR Code, will take children on an extraordinary underwater journey to observe fish in their habitat as if in a real dive. Reading age: 6 years and up.