What do you get if you cross a dolphin and a whale?!
A Wolphin!
Wolphin - Killer Whale(M) + Dolphin(F)

A wholphin or wolphin is a rare hybrid, born from a mating of bottlenose dolphin(F), and a false killer whale(M). Although they have been reported to exist in the wild, there are currently only two in captivity, both at Sea Life Park in Hawaii. The first captive wholphin was born on May 15, 1985 where a female bottlenose dolphin named Punahele and a male false killer whale named Tanui Hahai shared a pool.
The wholphin's size, color and shape are intermediate between the parent species. Wholphins, though not often sighted by fisherman, are known in popular seafaring lore as "the great grey beast."
What do you get when you cross a tiger and a lion?!
A Tigon!
Tigon - Tiger(M) + Lion(F)

A tigon or tigron is a hybrid cross between a male tiger and a female lion. Tigons can exhibit characteristics of both parents: they can have both spots from the mother (lions carry genes for spots — lion cubs are spotted) and stripes from the father. Any mane that a male tigon may have will appear shorter and less noticeable than a lion's mane and is closer in type to the ruff of a male tiger.
They do not exceed the size of their parent species because they inherit growth-inhibitory genes from the lioness mother, but they do not exhibit any kind of dwarfism or miniaturisation; they often weigh around 180 kilograms (400 lb). The comparative rarity of tigons is attributed to male tigers' finding the courtship behaviour of a lioness too subtle and thus may miss behavioural cues that signal her willingness to mate.
Male tigons are sterile while the females are generally fertile. Because only female ligers and tigons are fertile, ligers and tigons cannot reproduce with each other.
And finally, what do you get when you cross a lion and a tiger?!
A Liger!
Liger - Lion(M) + Tiger(F)

The liger, is a hybrid cross between a male lion and a female tiger. It resembles a tiger with diffused stripes, and they are the largest cats in the world! Ligers and tigers enjoy swimming, whereas lions do not. Rare reports have been made of tigresses mating with lions in the wild. They attain great size, weighing approximately 320 kilograms (700 lb) and reaching 10 feet (3.05 m) long on an average, imprinted genes may be a factor contributing to liger size.
Ligers have a tiger-like striping pattern on a lion-like tawny background. In addition they may inherit rosettes from the lion parent (lion cubs are rosetted and some adults retain faint markings). These markings may be black, dark brown or sandy. The background color may be correspondingly tawny, sandy or golden. In common with tigers, their underparts are pale. The actual pattern and color depends on which subspecies the parents were and on the way in which the genes interact in the offspring.
The tiger produces a hormone that sets the fetal liger on a pattern of growth that does not end throughout its life. While male ligers are sterile, female ligers can usually reproduce. Because only female ligers and tigons are fertile, a liger cannot reproduce with another liger or with a tigon.

These are just some of the few exotic hybrids that exist on earth, although they've existed forever, surprisingly very few people know about them!
Some hybrids 'd like too see..
Behold! The wonders of nature!
How about a cheetah and a kangaroo? - A Cheegaroo?
Or maybe a rat and a mouse? - A Rouse?
Or a falcon and a duck? - A F..uh..'m gonna skip this one.
Image Sources: Hinny, Cama, Grolar, Grolar, Zonky, Zorse, Zony, Leopon, Leopon, Wolphin, Tigon, Liger