There are many different types breeds of guinea pig, each with their own characteristics, coloring and markings. Some are more common than others, such as the Abyssinian which is quite a common type of cavy, and some, like the Merino are rarer. Many guinea pigs which you find in the pet shops or rescue centers are a mixture of various breeds.
If you're thinking of getting a new guinea pig, we always recommend that you go to a rescue center rather than a breeder as there are so many of these lovely pets who need a caring home.
Here is a list of guinea pig breeds with pictures to show you what the different hairdos look like: