Crocodiles have three brothers - Gavialoidea, Alligatoroidea and Crocodyloidea. Their ancient ancestor from the Triassic period was Protosuchus. Crocodiles are ambush predators that wait patiently for prey to approach and then rush to attack. As cold-blooded animals, they can survive long periods without food due to their slow metabolism. Despite appearing slow, crocodiles are apex predators in their environments.

1. Protosuchus Gavialoidea Brother Alligatoroidea Grandfather’s Grandfather’s Grandfather’s ….. Grandfather Brother Crocodilia Brother Crocodyloidea

2. Crocodilia= Crocodile Crocodile has 3 brothers, Gavialoidea, Alligatoroidea and Crocodyloidea. Crocodile’s Grandfather’s Grandfather’s … Grandfather is Protosuchus, which was born in Triassic period. Crocodiles are ambush hunters, waiting for fish or land animals to come close, then rushing out to attack. As cold-blooded predators, they have a very slow metabolism, and thus can survive long periods without food. Despite their appearance of being slow, crocodiles are top predators in their environment. Many large crocodiles swallow stones which may act as ballast to balance their body or assist in crushing food,similar to grit in birds.