The millions of tasty little fish they've been stalking for so long.

Young gannets join the frenzy, in just six months they've become superb aerial hunters.

Time after time, the dolphins round up another shoal for destruction.

Frantically, the little fish try to get away from the seething surface of the water, to dive beyond the range of the gannets.

Now, something truly astonishing happens.

Diving takes the gannets down to 10 meters, then the aerial squadrons become shoals of swimmers as they pursue the fish down to 20 meters.

Sardines join with their predators in a beautiful yet macabre underwater ballet.

There's little chance of escape for these fish.

The Bruda's whale takes in 10,000 fish in one giant mouthful.

But this time around, there are plenty of sardines for all.