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Choose a Page:Does the killer whale deserve its ...What is a sea mammal?Why do whales sing?Which is the biggest whale?*Why do whales spout?*How does a whale leave a 'footprint'?Are mermaids real?Why do dolphins beach themselves?What is a narwhal's tusk used for?Why does the elephant seal have an...How did the right whale get its name?How does a seal keep warm?What is the difference between a s...Why does a walrus have tusks? Why do whales spout? When a whale dives, the pressure forces water into its nostrils and air tubes. Just as a diver has to blow water out of his snorkel when he surfaces, so the whale has to spout. A killer whale   Previous: Back Book: 1001 Section: Nature Chapter: Sea Mammals