Apparently, enough to make the bluefin tuna extinct.
What a cool animal. It's too bad the fishing industry has more influence than brains. My emphasis.Given that tagging studies have shown that the half-ton tuna can roam the full span of the Atlantic in seeking breeding and feeding grounds, the European position is widely seen by fisheries specialists as sending the fabled species spiraling further toward outright collapse. At the center of the fight, spurred largely by the worldwide sushi trade, is one of nature’s most magnificent, and endangered, experiments — a transatlantic torpedo that can sprint at highway speed while warming its brain with energy from its muscles.