is asleep and only one of their eyes closed we still don't know why they don't have the so called r.e.m. or. rapid eye movement phase of the sleep cycle in other words they're incapable of dreaming by studying the unique sleep habits of marine mammals we can understand some mechanisms of human sleep disorders. for example the absence of sleep as we've proven whales and seals especially can go on without sleep for several days people also have the restless feet syndrome is when people move their legs and feet while asleep. the dolphins can actually sleep while swimming by and of course we hope that one day system will be able to understand what exactly happens to a person during his sleep which. lake which is the natural water reservoir that's connected to the sea it's less than a kilometer away. here in the natural pool there are several white whales that go through some very complicated training. thank animals are taught to use the hydro coup stick system to search for people in distress and water through. on the trainer's command the animal checks the whereabouts and points in the directi