Why doesn't an iguana belong to the amphibians group?

Because amphibians have to be able to breathe in water and they have to keep their skin moist to survive. Amphibians have scale-less skin and lay soft, jelly-like eggs. An iguana is a reptile because: it has dry, scaly skin; it lays eggs with leathery shells and it is cold-blooded. It also can only breathe air, not water but all amphibians can breathe in water.