AMERICANS LOVE THEM some shrimp. Annually, they eat over a billion pounds of the little guys, making shrimp the nation's most popular seafood. But the journey from seven seas to cocktail sauce isn't always the friendliest for the environment -- or for the laborers who shell your seafood. So biotech New Wave Foods is trying to create a sustainable replacement for shrimp...by building really, really convincing crustaceans out of red algae.