Tuna without guilt

On the National Geographic Channel, "Dolphins: The Dark Side".

But the popular image obscures the fascinating and complex truth about dolphins. Far from cute playthings, they are wild animals. Intelligent and sometimes friendly, yes, but there are also cunning, aggressive and even brutal.

They don't exactly treat the female of the species too nicely, either. Does this mean we can go back to eating tuna salad sandwiches guilt-free?