The Committee to Nuke Elysium

The ancestors of sharks survived at least three mass extinctions. Sharks are a “generalist” species, which means they feed on a variety of foods in many different habitats. They can even eat garbage and survive. Humans can do that, too. So if we find ourselves in a situation where food supplies dwindle, we will still be able to eke out an existence eating bugs, slimes, and other perfectly fine sources of nutrition that most of us to do not ordinarily consider a meal.