Follow seahorse Hippo in his journey through one of the most colorful ecosystems of the world, the Coral Reefs of Abrolhos archipelago, in Brazil. Corals are tiny animals that build big "cities", the reefs. It is in the coral reefs that one in every four fishes live, as other amazing animals, like sea turtles. For that, they are very important places for marine biodiversity conservation.

Will Hippo be able to make new friends in this adventure? Set out to discover this magical and very threatened place with this book of the collection "There Are Underwater Cities"!