【正】Ocean is always a theme for documentary films on nature.The Silent World made by French Jacques Eves Kosto in 1956 is the first documentary film of ocean that has a full view of ecological scenes on seabed.Entertainment Weekly comments that"There are many excellent ocean themed documentary films in the world,but if you want to know the difference between the Ocean and those films,then it’ll be technology."During the process of making Ocean,Jacques Perrin and Jacques Cluzaud have invented and improved lots of equipments, applying the latest electrographic technology to capture the unprecedented texture of marine organism-fragile softness of medusa,mattress-like belly of blue whale etc.