So some of the breeds I told you about are not "officially recognized" as breeds by the ACBA (american cavy breeders association) and other guinea pig breeding organizations. They are considered "future breeds" so they basically are a breed but they aren't common enough to be officially recognized. These include:
Hairless guinea pigs (skinny pigs)
I recently found out that apparently the rex guinea pig (the one similar to a teddy) is no longer considered a breed it is now considered a coat type by most. (I say most because I found a few sources saying it was still a breed) (but most said it is now a coat type). Confusing.