On the trail of the men who hunt exotic shellfish and trade it illegally

The trade in exotic shellfish is part of a trade which is earning criminals some $70m a year.

The smuggling of the giant sea snail - known as abalone - is being linked to the Chinese Triads and international drug gangs - who capture the fish from the deep and then smuggle it into China and Hong Kong where it is eaten as a delicacy.

Karen Allen reports.