 As a hedge against disaster striking the blue iguana population on Grand Cayman, an off-island captive population was established in 25 zoos in the USA. A minimum of 20 founder lines represented by at least 225 individuals is being maintained by captive breeding and recorded in a studbook for the species by Tandora Grant of the San Diego Zoo's Center for Conservation and Research for Endangered Species (CRES). The Indianapolis Zoo has had success with breeding the blue iguana in captivity twice since the year 2000.
