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Whales

Whales, the greatest mammals on earth, are animals of superlatives. The Blue Whale is reaching a length of up to 30 meters and a weight of about 160 tons. Sperm Whales are able to dive as deep as 3,000 meters. Some species of whales can produce upt to 622 different noises. New researches have shown, that presumably every population of whales has its own typical song. Caused by environmental pollution and hunting the populations of the great marine mammals are decreasing.