At the farthest reaches of Earth, in the coldest waters on the planet, lives a two-ton beast with thick tusks that measure more than three feet long-the mighty walrus. Don't be fooled by its gigantic size and odd appearance-a walrus isn't a slow, lazy creature that lies around the ice all day. These animals spend most of their time in the water, where they are strong and skilled swimmers.Feel a Meal: A walrus' snout is covered with 400 to 700 long, thick whiskers, which are arranged in about…