A hybrid animal is born when two different animal types breed and have an offspring that exhibits characteristics each from the different animal parents. There are five different kinds of hybrids and they differ on the relationship of the two parent species.
Intra-specific hybrids are mating between two animals within the same species. An example of this would be two different types of leopards mating with one another.
Inter-specific hybrids are mating between two animals within the same genus. This would be the hybrid type is a lion and a tiger decided to mate.
Inter-generic hybrids are mating between two animals in different genera. This hybrid type would be formed if say a sheep and a goat were to mate.
Inter-familial hybrids are mating between two animals from different families. This is extremely rare.
Inter-ordinal hybrids would be mating between two animals from different orders but this has never been reported.
Several examples of hybrid animals are the Zedonk, Liger, Jaglion, and Beefalo. There are many more that have been reported, but none as interesting in my opinion as the Wolphin.
The Wolphin is a rare hybrid that originated from two different dolphin species. The Bottlenose Dolphin and the False Killer Whale mated to create this world wonder. This is an intra-specific hybrid that has been rumored to occur naturally in the wild. There has never been a Wolphin caught in the wild but as the intra-specific hybrids are most easily formed by two parents in the same species it is not outlandish to believe that the situation could occur.
There are currently two Wolphins being held in captivity, both in Hawaii. In the early 1980’s a female dolphin and a male false killer whale shared the same pool. Trainers did not suspect anything would or could occur between these two animals and as such never thought twice about the pair-up. On May 15th 1985 the first captive Wolphin was born. This animal was approximately in between the two parents when it came to color, size, and number of teeth. Kekaimalu was her name and she was a darker grey than her mother, a little bigger, and had 66 (exactly between the number of the mother and father).
This initial Wolphin has also given birth to three other Wolphins. Unfortunately one of her young died after only a few days and the other after nine years. Her third offspring, which was born in 2004 is still alive today and is with her mother at Sea Life Park. Kekaimalu and Kawili Kai are the only two Wolphins in captivity and the only proof that they can occur in nature and do in fact exist.
Hybrid information found on Wikipedia.
Wolphin data found on Wikipedia
See Kekaimalu and Kawili Kai at MSNBC