How to: Turn a fish vegetarian

Researchers have figured out a way to feed meat-eating fish on an all-vegetarian diet — essentially, they've made the fish-food version of Tofurky. Why? Turns out, commercial fish farms catch lots and lots of small, wild fish every year, in order to feed the bigger fish that they raise and sell. This new feed (based on plant proteins) could save both money and wild ocean fisheries, leaving the small fish to grow and multiply.