Gray whales and sperm whales are carnivores. So are Humpback whales, which switch off between krill and small fish (like sardines), depending on what's availab

Gray whales and sperm whales are carnivores. So are Humpback whales, which switch off between krill and small fish (like sardines), depending on what's available. Also, hippos have been observed killing and eating other animals, so they've been moved into the "mostly herbivorous but enjoy a meaty snack on occasion" category.