Tiny krill are turning up in deep-sea hydrothermal vents. Scientists want to know why

Antarctic krill are the lifeblood of the South Pole.

Science Near Icy Waters, Marine Life Gets By Swimmingly These shrimp-like crustaceans serve as a crucial food source for penguins, seals, and whales. "Most of them feed on Antarctic krill," says Kim Bernard , a biological oceanographer at Oregon State University and a National Geographic explorer. "And if they don't, they feed on something else that feeds directly on Antarctic krill. So they are absolutely fundamental to the functioning and health of that ecosystem."

For new discoveries, everyday mysteries, and the science behind the headlines, follow NPR’s Short Wave podcast.

Krill also recycle nutrients that allow tiny algae called phytoplankton to grow. In addition, krill are fished in large numbers to produce aquaculture feed and omega-3 fatty acids as dietary supplements.