The White Wolfos are a set of enemies who once served as the role of mini-boss in the Legend of Zelda series.
They didn't make but one appearance in Ocarina of Time as the main bad-guy of the Ice mini-dungeon. He's a little forgettable in this encounter.
But they were crawling all over the place in Majora's Mask in the snow areas. If I remember right, they would pop right out of the ground for a sneak attack. Pretty neat and a little scary for a Zelda game.