What's to see here? Some guys that are gung-ho about fishing blue fin to extinction? 'In November 2012, 48 countries meeting in Morocco for the International Commission for the Conservation of Atlantic Tunas voted to keep strict fishing limits, saying the species' population is still fragile. The quota will rise only slightly, from 12,900 metric tons a year to 13,500. The decision will be reviewed in 2014.' Dated info - but really, what better way to save a species than to kill enough of them to collectively weigh in at 13,000 metric tons. That is the equivalent of killing 65,000 individuals if they were to weigh on average 400 pounds.
The truth is, nobody knows how many of any specific thing swims, or crawls, in the ocean. There is no manner to accurately arrive at a figure. And here we have yet another show glorifying wanton greed, again, in the troubled oceans.
How and why National Geographic considered this worthwhile, especially from this perspective (exploiting the ocean for money), and for six seasons is beyond me. Six seasons lacking any conscious awakening on behalf of Nat Geo upper management.