Dark fishing: Greenpeace investigation uncovers illegal activity

Probe estimates up to 14 million tonnes of unreported fish catches worth around $23bn are traded every year.

It is estimated one in five fish brought to markets is illegally caught, often by a so-called “dark” fishing fleet.

This refers to vessels that switch off their satellite tracking to hide their activities in far-flung parts of the world’s oceans.

Now a Greenpeace investigation has uncovered the scale of the problem and the need for greater ocean protection.

Al Jazeera’s Nick Clark reports.