Carnivore/ˈkɑːrnɪvɔːr/ Definition 1 of 3Pro Tip 1/3Not All Predators Not every animal that preys on others is a carnivore; some eat plants too. Bears hunt fish, but they're not carnivores as they also enjoy berries. Pro Tip 2/3Size Varies Carnivores range in size from tiny creatures to large predators. A small carnivore like a weasel can be just as effective as larger ones. Pro Tip 3/3Diet Specificity 'Carnivore' highlights the exclusive meat-based diet of an animal. Unlike omnivores, a true carnivore won't eat fruits or vegetables.