In a paper published in Frontiers in Ecology last month, scientists have shown that several species of penguins regularly feed on jellyfish. This find is surprising as it was traditionally thought that penguins subsist primarily on nutrient dense foods like fish. Jellyfish are over 90 percent water and mean that the penguins expend a lot of energy for not a lot of caloric payback for this food source.
In their research the scientists documented several species of penguins regularly feeding on carnivorous jellyfish even when there were other food sources readily available.
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