American marine biologist and National Geographic explorer-in-residence since 1998
Environmentalists warn there is no safe level of krill extraction in Antarctica as CCAMLR negotiators wrap up talks. Fishing has paused after a 620,000 metric ton cap, while calls for a California-sized marine protected area near the Antarctic peninsula intensify. Krill play a crucial role in the ecosystem and carbon capture, and researchers warn warming oceans are pushing krill toward cooler waters.