Crocolizard

Crocolizard is a species of large crocodilian-like lizard native to New Zealand. They first evolved as marine iguana-like lizards that made their way from nearby islands to mainland New Zealand during the early part of the Cenozoic era, where they had found no competition nor predation from crocodilians, so over millions of years, they evolved into large carnivorous Chasmatosuchus-like amphibious lizards that fill the similar niche to crocodilians elsewhere. Unlike (most) crocodilians, crocolizards have anti-freeze in their blood to prevent them from getting frostbites and similar effects from the cold of New Zealand.