A fun exploration of a tiny animal at the base of the ocean food chain: Of all the life forms in Arctic seas and the ocean around Antarctica, krill are the most important. Krill are the largest animals able to catch and eat phytoplankton, and they in turn are eaten by the largest animals ever to live on earth - blue whales - as well as by seals, penguins, and a host of others. In other words, krill are really good at eating, and krill are really good eatin'.