They are hungry with snakelike bodies.

Onda collapsible dorsal fin.

They're perfectly equipped to squeeze through a labyrinth of tunnels scouring the reef.

They follow scent trails to locate prey when they found a victim that can be known to work together, trapping exits, shepherding straight fish to their deaths.

But for these predators, there's more than one way to catch a fish.

If a meal eludes them, they have another sense in reserve.

Electro receptors on their head could detect and animals by electrical energy.

Even the tiniest electrical signal the smallest.

The heartbeat of the frightened fish will reveal the hiding place shocks Pass parrotfish doesn't move a muscle.

But against the super senses of these night stalkers, parrotfish stood no chance.

He's checking this whale out, and he, uh, he's gonna eat something.

Soon he's going for going fighting with force of nearly two tons per square inch and Saul's on hunks, flesh size of trench dance power.

He just ripped a hole in front of that well 18 footer, abandons its meal and starts to circle boat.

They don't know what it's doing, but it's coming so close.

Great decides to try and take it.

All right, baby.

Come on.

Way fifth.

Great white to join Greg.

Study like ruthless and storm now carries a satellite.

How's that tag look good Floating?

Yeah, Came right up.

This one set to release in eight months in April of 2011 it'll be the last Greg's tags to employ two ton elephant seals are in the water.

The conditions are right for a deep water attack, maybe staying deep again because it's so bright.

But that's gonna change in the next 15 minutes to it.

Half hour.

She's biding her time.

You know, just biding your time, hanging deep, waiting for one of these seals to make a mistake.

Nearly invisible, deep blue stays down at 300 feet, waiting for a seal to pass overhead.

She can see 10 times better than us in low light.

Is an elephant seal up there and getting to the colony.

That's okay.

If the team is right, deep blue will strike.

Is the Bulls dive team and make a run for sure.

John Cam's right on top of the sharp sun setting behind the mountain.

We're still tracking into the evening here, right into hunting territory.

So we're on edge.

Deep blue stays d oh, it's another shark that sneaks in for the attack.

A smaller, aggressive male tries to stake his claim on the territory way.

Have a shark bite shark, tam, and it's definitely not the shark tracking.

Yeah, our girl still deep.

You know you don't want to see Shark Camp did hit like that.

But at the same time, you know there's benefits, too.

I want to see if these animals are striking vertically at death.

102 100 feet down booth sharks high d waiting for the seals to arrive as they dive.

For sure, the sharks attack vertically, striking at death.

As the body floats to the surface, they feast.