Octorok

The Octorok is perhaps as much part of the Legend of Zelda as Link or Zelda, having appeared in every Zelda game except Twilight Princess. It's an octopus, shooting rocks from it's snout. In the 2D Zelda games, they seem to have adapted to living on land, and can generally be killed with one or two hits from the sword. In the 3D Zelda's, they live in the water, and can be killed in a number of ways, the most common being using your shield to reflect the rocks they spit at you back at them, though they can be killed with any projectile as well. In Majora's Mask, shooting an ice arrow at them will make them platforms. In The Minish Cap they appear in 3 forms: Blue, Red, and Gold Octoroks. The blue one is tougher then the red one but the gold is the toughest and can only be found by fusing kinstones. And in The Legend of Zelda: The Wind Waker they are squid like creatures who shoot at you as always. When out in the ocean, these creatures shoot bombs at you instead of their normal attack. However if you are going at a good speed their attacks are easy to avoid, and pose little to no threat.