They’re long-bodied and long-lived lizards

Iguanas may live anywhere from six to more than 60 years, depending on the species. The Grand Cayman rock iguana, which may live up to 40 years in the wild and more than 60 years in captivity, has the longest lifetime. In captivity, most reptiles live far longer than they do in the wild. Green iguanas may live up to 20 years in captivity but only have an estimated eight-year lifetime in the wild. The marine iguana, in contrast, has a brief lifetime of just over six years.

It may take an iguana several years to achieve maturity. The majority will reach their maximum size in around 4 years, but others will grow for as long as 7 or 8 years. It will also develop differently and begin quickly, but after 3-5 years of age, growth will become noticeably slower. It could also temporarily cease growing before starting again.

Their tail makes up more than half of their whole body length. Iguanas may grow as long as 1.8 m when their tails are included. Smaller females may reach weights of up to seven pounds, while adult males may weigh up to nine pounds, with some huge males reaching weights of up to 18 pounds. In addition to having a dewlap, these lizards also have a row of length scales that extends from the middle of their necks to the base of their tails. Iguanas have diverse kinds of scales covering various parts of their bodies.