There are two generally accepted species of Fijian Iguanas. They live on the Pacific Islands of Fiji and Tonga, and are assumed to be descended from the South American Green Iguanas.
Fiji Banded Iguana. The males are blue-banded, while the females are entirely green. Classified as an endangered species, but captive breeding programs are being run successfully in US and European zoos. Males average 2.5 feet, with females a little smaller. Males have a much lower crest than the green iguana.
Fiji Crested Iguana. Similar to the Fiji Banded Iguana, but they have a much higher dorsal crest, especially in the nuchal area. Completely restricted to Fiji, they are not found on Tonga.