The article notes that the research indicated that fur seals were highly dependent on krill, since they undertake such arduous journeys just to reach krill swarms. What could that mean for the fur seals who live near the Aker Biomarine krill fishery in the South Atlantic? The Marine Stewardship Council is preparing to certify this fishery as sustainable, but their public report indicates that fur seals can easily switch to other prey when krill aren't available. Do they know for sure? If researchers are just realizing that some fur seals will travel a long way for krill, can we really say that we understand the extent of seal dependence on krill?