The Thunder was the most notorious and elusive poaching ship in the world; for ten years governments had struggled to catch it. Then, in 2014, a crew from the organisation Sea Shepherd - known for its anti-whaling activity - found it illegally hunting Patagonian toothfish in the ice flows of the Antarctic and decided to stop it. They pursued the Thunder for 110 days over 10,000 miles before a dramatic stand-off in the Gulf of Guinea. Captain Peter Hammarstedt, from Sea Shepherd, tells Jo Fidgen about the dramatic chase and eventually watching the Thunder as it burned.

On-board recordings in this piece are from the documentary Ocean Warriors: Chasing the Thunder, courtesy of Brick City TV.

Presenter: Jo FidgenProducer: Mariana Des Forges

Photo: The Thunder surrounded by icebergs Credit: Sea Shepherd