From Creatures Wikia
An Adoption Center is a site that has creatures that have been exported from a Creatures world and made available for other users to import into their game by downloading from a webpage or requesting an adoption via email. Some centers offer only creatures they have bred, only creatures that have been sent to them by others to place for adoption, or both. There are many places in which adoptions may be found - popular sites include the Norn Adoption Clinics, Alien's Norn Adoption Center, The Creatures Repository, and ZauberAlbia's Cyber-Station. Some facilities are audited by the Albianischer Adoptions Prüfdienst.