Reefs are magnificent edifices, hosting about 25% of marine species, yet they remain largely unknown. What is the origin of these natural structures?

Under the sea and on earth, sight is crucial, and being invisible is a great asset — a feat some marine creatures master with camouflage.

Each link of the food chain is vital for the whole system and is made of specific behaviors that are often strange and fascinating.

Certain marine animals are indeed strange. The sea still holds many surprises for us, and human curiosity has turned strange into something fantastic.

What happens to life in the sea when darkness falls? In the underwater world, the night is a privileged moment for exceptional encounters.