Iguanas are born with teeth - that's how they are able to easily harvest leaves. As the iguana gets bigger, the almost transparent teeth also get bigger and are so more easily seen when the iguana opens its mouth.

Can iguanas bite your finger off?

Mathew said though it's unusual for an iguana to bite off a child's finger, the type of injury is quite common. ... "These injuries heal so beautifully, most patients don't need them," he said.

Do iguanas bite humans?

Although iguanas make wonderful pets, taming them can be a challenge. ... Iguanas do bite people, but only in self-defense. Their sharp teeth are specifically created to tear plants apart, but could be really painful to humans. Fortunately, they give a warning before doing so.