Opposite of predator, you have prey â the animals predators hunt and eat. Prey animals can be anything from the smallest insect to a 1400 pound bull moose. Some prey animals are herbivores, meaning they eat plants. Other prey species are omnivores, which means they will eat plants or animals. Most times, the word predator brings to mind an image of snarling teeth and slashing claws. While many predators fit this image, many others do not. Predators come in many sizes and shapes.