Over time animals have developed many ways to stay away from predators. A predator is an animal that hunts and eats other animals. Hiding is one of the best way to stay alive. Some animals hide by looking like the places where they live. To see how this work, let's look at the sea dragon. It's a master of disguise. The sea dragon is covered with skin that looks like leaves. The skin helps the sea dragon look like a piece of seaweed. A hungry meat eater would stay away from anything that looks like seaweed. Other animals stay safe by showing their colors. They want other animals to see them and stay away. Scientists call these bright colors warning colors. Color doesn't offer enough protection for some other animals. They have different defenses that help them survive in the wild. Many fish live in groups or schools because of the safety in numbers.