Wietse has spent the past 2 1/2 years as an activist with Sea Shepherd, the direct action sea conservationists. We caught up with him during a brief visit to Nottingham to find out what he's been up to on his voyages to the Antarctic and most recently, in the Meditteranean liberating bluefin tuna. He also spoke about The Black Fish, a new European ocean conservation project.

Amongst other articles and zines, Wietse is the author of The Bluefin Bonanza, a briefing booklet on bluefin tuna fishing in the Meditteranean.