In the coral reef coexist many species. The marine fauna and flora have here found conditions favourable to life. The clown fish, for example, does not rub against a plant, but rather an anemone, an animal of the polyp family.
The anemone, with its stinging tentacles, protects the clown fish from its enemies. The fish, in return, cleans its protector of parasites.

Long before science was able to study the symbiotic relationship between the clown fish and the anemone,
the sea was, for man, a place of countless mysteries. The lack of scientific information was compensated for by the imagination of man, filling the ocean with marine unicorns, giant snakes and mermaids.

On other occasions, the danger came from much more familiar animals, the snakes. The olive sea snake is not only swifter than any land serpent, but it also possesses the deadliest poison of any snake in the world.

Beyond the coral reef, lie the open waters of the ocean, one of the environments most feared by man since ancient times. The seabed is lost in the dark depths, and all that can be seen is the so-called Great Blue, the immensity of the ocean. This is a world almost without colour, dominated by the great sea predators, the territory of the most feared ocean animal, the shark. Of all the species of shark in the seas, only a few attack man, but that has been enough to earn them a reputation inspiring fear and panic. the warm waters of the Indian Ocean are visited by white sharks, the most dangerous of all.