Foodwise, the blood test showed that the penguins had gorged on crustaceans during their time at sea.

在食物方面，验血显示，这群企鹅在海里那段时间吃了许多甲壳类。

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Port Jackson sharks can grow up to 1.6 meters long (5.5 ft) and typically feed on crustaceans, sea urchins, and fish.

来自Port Jackson的鲨鱼最大可以长到1.6米长(5.5英尺)，通常以甲壳类动物，海胆和鱼为食。

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Concerns about the effects of changing ocean acidity on animals has focused on weakening shells in corals, crustaceans and shellfish, but fish may also be affected.

对海域酸性变化效应的关注点主要集中在珊瑚、甲壳类和贝类的壳上，它们的壳正在变软。但鱼类也有可能被影响到。

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Krill (crustaceans resembling prawns) subsist on phytoplankton and are in turn eaten by fish, squid, jellyfish, seabirds, penguins, seals, whales and other animals.

BBC: How Antarctica works

And given that the krill (tiny crustaceans) that penguins feed on are also dependent on the ice for their own existence (they feed on algae on the ice) - some colonies affected by eroded floes could face a double-whammy of high fledgling mortality and restricted food resources.

BBC: Emperor penguins counted from space

For example, in a study published last year in the Proceedings of the National Academy of Sciences a group of researchers looked at crustaceans (crabs, shrimps, woodlice and so on) over the past 550m years and found far more examples of groups of species evolving towards complexity than in the other direction.

ECONOMIST: Evolution