Suck, swish, gulp

摘要

Just about every place on the planet has a predator at the top of the food web. The African savannahs have the lion, the jungles of Asia the tiger and the arctic tundra the polar bear. In the Antarctic it is the leopard seals who dominate as voracious hunters of penguins and other seal species. But a new study examining their feeding habits led by David Hocking of Monash University in Australia, has revealed something unusu al: how leopard seals use an efficient filter-feeding system to eat near the bottom of the food chain too.