A GRAPHIC video from Greenpeace shows footage taken by a helicopter pilot who works with tuna fishers to help find large groups of tuna.
The fisherman use Fish Aggregation Devices which attract not only tuna, but all other types of marine life.
As a by product, sea turtles, whales, sharks, manta rays and more are caught and killed as "by-catch."
Check out the above video to see an anonyomous helicopter pilots expose on the tuna industry and his call for change.
And again, BEWARE… it is GRAPHIC!