Hamsters (Cricetinae) are small rodents of the family Cricetidae which form the subfamily Cricetinae. There are several species, divided into different genera. Some species are raised in captivity as a pet, for animal testing or for their fur. The first was the golden hamster, which now exists in multiple colored varieties and, more recently, dwarf species such as Roborovski's hamster, Russian hamster, Campbell's hamster and Chinese hamster.