Hatchling from my B5 pairing Prehistoric looking ? Mr. and Mrs. longhorn. B5 Bloodline Hatchlings from my B5 pairing Prehistoric looking ? Mr. and Mrs. longhorn. This particular pair has the longest horns on the farm, and they are a beautiful blue color west Indies island rock iguanas are ? collectively ?the most endangered species iguanas on the planet. These huge land iguanas are best known for their massive prehistoric look and intimidating horns at the tip out of their nose. featured in the 1959 movie classic "Journey to the Center of the Earth" starring Pat Boone these iguanas have fascinated collectors for years