Ocean defence activist (and co-founder of Notts Indymedia) Wietse has spent the past 2 1/2 years as an activist with Sea Shepherd, the direct action sea conservationists. Riseup Radio 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 Mediterranean liberating bluefin tuna. He also spoke about The Black Fi…