The
Shar Pei is a breed of dog that originated in China
and has the distinctive features of deep wrinkles and a blue-black tongue.
The name translates to "sand skin," and refers to the texture of its short, rough coat.
As puppies, Shar Pei have lots of wrinkles, but as they mature,
the wrinkles disappear as they "grow into their skin".
Shar pei's were once named as one of the world's rarest dog breeds by
Time magazine and the
Guinness Book of World Records.
The American Kennel Club did not recognize the breed until 1991.
This and even more information can be found at
Wikipedia