This World Oceans Day, don't forget the little guys. Though they might be pint-sized, sardines and other "forage" fish play mammoth roles in marine ecosystems from Peru to the Philippines. Sardines are the basis for ocean food chains that support giants like whales, seals and sharks. They're also a vital source of healthy, affordable protein for communities around the world. Below, learn some amazing facts about sardines — and why we need to protect them.
Graphic by Rosie Ettenheim. Text by Allison Guy.