A few years ago I wrote an essay called "Wicked Tuna: NGS Supports Killing These Majestic Beings" about the launch of a series about killing these sentient animals. I figured the series would run for one season and then be pulled in favor of something else that would be less brutal and more in line with good conservation practices. With much regret, I was wrong. The series continues, as does the horrific treatment of these amazing animals.
In various trailers you can see (if you choose and can stand it) tuna obviously writhing around in pain as the commentator dispassionately talks about these sentient beings as mere unfeeling commodities. I am astounded that the National Geographic Society (NGS) would continue to air such a series given their commitment to a wide variety of conservation projects around the world along with their series of kid's magazines, books, and TV specials.
The NGS also notes, "The Atlantic bluefin tuna is one of the largest, fastest, and most gorgeously colored of all the world's fishes" and also "bluefin meat also happens to be regarded as surpassingly delicious, particularly among sashimi eaters, and overfishing throughout their range has driven their numbers to critically low levels." An update on the status of these fish can be seen here.