How to animals protect themselves 动物的自卫方法

动物的世界非常奇妙，虽然居住在同一个环境，不同的动物有不同的自卫方法。猜猜看它是谁？It is a very fantastic in animals world.Even they live in a same environment but they have different ways to protect themselves from enemies or environment. Do you know what animal is it?