Each year the controversial dolphin hunting season sees fishermen on boats herd dolphins into the narrow cove in Taiji where they are killed by having a metal rod driven into their necks.

The best looking dolphins are separated and sold to aquariums.

In the video, Ric O’Barry - founder of The Dolphin Project and star of the 2009 Oscar-winning documentary The Cove - shows a panicked family of Risso’s dolphins swimming around in a sea pen, having been herded into the cove from deeper waters.

Their stress is evident as some of the dolphins tangle themselves up in the netted walls. Others attempt to swim beneath the nets but end up on the side closest to the shore instead of escaping into the open ocean.

One animal beaches itself on the rocky shore at O’Barry’s feet, rolling on its back as it tries to escape.

O’Barry can do nothing to help: "I will be arrested immediately," he says. "The police are all over the place."

Activists risk lengthy prison sentences if they interfere with the hunt.

"This is anguish," O'Barry says, crouching down near the dolphin. "[He's] panic-stricken on the rocks, and I am heartbroken that I can't get in the water and help him away from ... he's tearing his skin up. This is awful."

Eventually, a boat of fishermen slowly makes its way over to the stricken animal. When they arrive, they grab the dolphin by its fin, pushing it out into the water.

"The dolphin’s not going to make it. He’s given up,” O’Barry says.

Moments later, the dolphin sinks to the bottom of the cove.

(independent.co.uk)