An estimated 600-800 fatalities a year.

Can be found in Africa and Australia.

With terrifying speed, crocodiles can launch themselves out of the water like a missile and latch hold of their prey. They then go into a death roll, spinning the victim around and around to disorientate, thereby lessening its chance of escape.

Straight from the society of stating the obvious: do not swim in areas where there are crocodiles. It may be hot, and you may want a swim, but the croc will see you coming and the rest doesn't bear thinking about. If you're unfortunate enough to be grabbed, shout, scream, claw... and pray.

The crocodile gets its name from the Greeks who observed them in the Nile river. The Greeks called them krokodilos, a compound word from kroke, which means "pebbles" and drilos, which means "worm". To the Greeks, this "worm of the stones" was so named because of the crocodiles habit of basking in the sun on gravel-covered river banks. Crocodiles are the most advanced of all reptiles despite their prehistoric look. Unlike other reptiles they have a four-chambered heart, diaphragm and cerebral cortex. Their external morphology on the other hand is a sign of their aquatic and predatory lifestyle. A crocodile’s physical traits allow it to be a successful predator. They have a streamlined body that enables them to swim faster. They also tuck their feet to their sides while swimming, which makes the animal even faster, by decreasing the water resistance. They have webbed feet which, although not used to propel the animal through the water, allow it to make fast turns and sudden moves in the water or initiate swimming. Webbed feet are an advantage in shallower water where the animals sometimes move around by walking.

Crocodiles are very fast over short distances, even out of water. They have extremely powerful jaws capable of biting down with 3,000 pounds of pressure per square inch, and sharp teeth for tearing flesh, but cannot open their mouth if it is held closed. There are stories of people escaping from the long-snouted Nile Crocodile by holding its jaws shut. Zoologists will often subdue crocodiles for study or transport by taping their jaws or holding their jaws shut with large rubber bands cut from automobile inner tubes. All large crocodiles also have sharp and powerful claws. They have limited lateral movement in their neck, so on land protection can be found by getting even a small tree between the crocodile's jaws and oneself.

Crocodiles become more aggressive during the mating season, they can move fast over short distances on land. Crocodiles are adept at learning and memorising routines, such as the location of nearby campers or the routes of travellers. In water, they tend to drag their prey under and drown them. Crocodiles can slow down their metabolism, to the extent that a tree with an intruder hiding in its branches may be guarded continuously for several weeks, without breaks for food. They have strong muscles holding their jaws shut, but weak muscles for opening them. There is a sensitive flap in a crocodile's throat, known as the glottis, which they use for breathing. As a result, similarly to some other predators, forcing the arm into the throat may encourage release, although this is not certain by any means.