Oceans makes a few explicit pleas for humans to take better care of the planet, with harrowing satellite images of rivers coughing pollution out into the sea and unwanted fish snagged on bottom trolling industrial nets. But Perrin and Cluzaud mainly emphasize the seas beauty and power as its best argument, finding exquisite choreography between those florid stretches of narration. In one sequence, the seeming chaos of dolphins, schools of fish and kamikaze seagulls off the South African coast meld into an unexpected harmony; in another, razorfish and garden eels engage in a mesmerizing ballet on the ocean floor.