1. Cetaceans are rare hybrid animals, which are bred by bottlenose dolphins and pseudo killer whales.
2. Cetaceans are between whales and dolphins in size and skin color.
3. Kekaimaru, the world's first artificially bred cetacean, has significantly reflected this point. The bottlenose dolphin has 88 teeth, the pseudo killer whale has 44 teeth, and Kekaimaru has exactly 66 teeth.
