According to this sobering documentary we will only have ourselves to blame if, by circa 2060, most of the fish we eat have become extinct.
This is because we have overfished the oceans on an exorbitant and irresponsible scale. Based on the book by journalist Charles Clover, it serves up the science of this potential catastrophe in firm, digestible chunks, though it perhaps didn't require the gloopy New Age music as garnish. Ted Danson narrates, calling, as it were, "time, please" on the continued plundering of rare species (eg blue fin tuna) and those restaurants still serving them. That means you, Nobu.