Narluga
These very benign-looking marine mammals are a cross between beluga and narwhal whales. In the ’80s, a skull of a narluga washed up on the shore of Greenland. Upon examination, it was found that this whale had the physical traits of both its parent animals.
That initial find was the first official discovery of these animals. Since they originate from the same family of whales and therefore occur in nature naturally, this crossbreeding is neither rare nor surprising. There is still much to learn about this interesting hybrid.