1. Nile Crocodile
5000 psi
(http://i1.wp.com/listverse.com/wp-content/uploads/2012/11/nile-crocodile_cc-0299.jpg?resize=400%2C266)
In the National Geographic experiment the Nile Croc actually tested lower than the Saltwater Croc, but most other sources have the Nile Croc at 5000 psi. Nile Crocs tend to be about the same size as Saltwater Crocs and thus their bite seems to be at the same range. The two are interchangeable when it comes to the placing on this list and the numbers will vary due to the difficulty in measuring the bites of each and getting the right sized croc to measure.
Nile crocs eat mainly fish but like their cousins, they will attack anything dumb enough to cross its path. This includes zebras, birds and even small hippos.
2. Saltwater Crocodile
3700 psi
(http://i2.wp.com/listverse.com/wp-content/uploads/2012/11/crocodile-facts-for-kids1.jpg?resize=400%2C300)
These monsters are found from eastern India to southeast Asia and northern Australia. Saltwater Crocs eat anything they can bite from water buffalo to fish and even sharks. They are affectionately referred to as “salties” by Australians, yet there is little to be affectionate about when it comes to this giant. They are responsible for more attacks on humans than any other croc but not much more than the next on this list.
3. American Alligator
2125 psi
(http://i1.wp.com/listverse.com/wp-content/uploads/2012/11/AMAL-022125.jpg?resize=400%2C264)
The American Alligator is one of only two species of Alligator left in the world, the other being the Chinese Alligator. With an estimated population of 5 million; 1.2 million live in the state of Florida.
4. Jaguar
2000 psi
(http://i1.wp.com/listverse.com/wp-content/uploads/2012/11/jaguar-mouth.jpg?resize=400%2C300)
Source http://listverse.com/2012/11/05/top-10-animal-bites-that-will-completely-destroy-you/ (http://listverse.com/2012/11/05/top-10-animal-bites-that-will-completely-destroy-you/)