Underwater shots of the gill nets used by an Iranian flagged fishing vessel,
These types of vessels often fish for tuna with 7 mile long gill nets, fishing with a gill net over 1.5 miles is illegal.

Greenpeace is in the Northern Indian Ocean to bear witness to the destructive fishing practices of under documented fishing fleets which it is estimated cause the bycatch of 80-100,000 cetaceans per year.