Is there any truth in the legend that Sperm whales, the largest carnivores on earth, live in the depth of the Mediterranean? And what about the monk seals, one of the most endangered mammals on earth? Very little is known about the elusive seals that once populated most beaches from Greece to Spain.

About 10 years ago Ute Margreff got to know the female solitary dolphin Mara – it was the start of an unusual friendship. In the Pacific Northwest, Florian Graner found his private paradise close to Seattle, where he dives into a world inhabited by sea lions, giant octopuses and orca whales.

The Ocean Sunfish or Mola is the biggest and one of the most weird bony fish in the Pacific as well as in the Mediterranean Sea, normally living in the unreachable deep sea. In Florida we meet the massive but gentle Manatees, and see how they live, and how they are endangered.