Telegraph: The results of the largest ever survey of Antarctic marine life reveal melting sea ice is decimating krill populations, which form an integral part of penguins’ diets. The six-inch-long invertebrates, also eaten by other higher Southern Ocean predators such as whales and seals, are being replaced by smaller crustaceans known as copepods. These miniscule copepods, measuring just half a millimetre long, are too small for penguins but ideal for jellyfish and other similarly …