Whales, penguins, iguanas and dolphins have all inherited a burdensome legacy from their land-dwelling ancestors - they must breathe in open air! To master their marine sphere, they have had to re-invent shapes and develop new methods.
Blue whales and hordes of tuna, the great predators haunt the vast oceanic desert. Voyage alongside them through the vast, blue, liquid expanse - a front-row seat for their savage feasts.
Coral polyps are the tiny animals that have changed the geography of our planet. They construct underwater mountains to shelter an extraordinarily diverse group of species, of every color, every shape and every behavior. They even offer a peaceful lagoon for the mother whale and her newborn calf.
Untold and astounding multitudes are moving through the sandy plains that appear to be empty. How do they hide? We learn their secrets, as well as those of the animals which live well-protected in the tight mesh of giant seaweed underwater forests.