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Our oceans are alive with sound. Sound that most of us never hear. But there is one man who is definitely listening.

"The blue whales in the eastern-north Pacific of the California coast make two primary types of calls. You know one that's very pulsive, called 'Wu Wu Wu' ."

This is rhythmic drubbing drumbeat is the A call.

"Another is a more constant call that you know, kind of a low moan that drubs like were in a frequency"

In fact the B calls blast /at such a low frequency our human ear barely arrest the sound.
Equipped with a underwater *camera from national geographic, John and his team head to the water of the center coast of California to eavesdrop on the calls. Blue whales travel/ their * in the largest underwater gorge in the west coast of United States. The water is rich with krill. The team deploys the camera on the back of the blue whale.

"Searching copies is on"

What the footage reveals is a deep water dive near a 1000 feet down in the search for swarm of krill. Yet another **picks up a faint daunt beat just as John has been waiting for. It is the unmistakable beat of blue whales' A call. As the shape emerges from the darkness, another blue whale. The team discovered that perhaps the solitary giant isn't so isolate after all. The calls may be not about the foods but maybe about companionship instead.

"That's really need to see that we have one of the things we have been hoping to get which some of underwater footage carrying a call.. I'm excited , I am tantalized that I am wanting more."