A shark has a very powerful bite but the shark does not have enough bite force to bite through a crocodile although the shark could injure the crocodile but not too severely.
The longest living shark is the Greenland Shark.
The Greenland Shark is the kind of shark that lives the longest with an average lifespan of around 400 years.
The Greenland shark, also known as the gurry shark, grey shark, or by the Kalaallisut name eqalussuaq, is a large shark of the family Somniosidae, closely related to the Pacific and southern sleeper sharks.
Sharks do die of old age just like other animals and humans.
Sharks age faster than humans but a shark can live for up to 30 years although around 30 years of age a shark is considered to be around 85 to 90 years old in human years.
Sharks live for between 20 to 30 years.
The lifespan of a shark is 20 to 30 years although some sharks may live a bit longer than 30 years.
The shark or sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head.
Modern sharks are classified within the clade Selachimorpha and are the sister group to the rays.
Despite their scary reputation, sharks rarely ever attack humans and would much rather feed on fish and marine mammals.
Sharks are opportunistic feeders, but most sharks primarily feed on smaller fish and invertebrates.
Some of the larger shark species prey on seals, sea lions, and other marine mammals.
Whale sharks are essentially bulletproof, with six-inch-thick skin.
Though it's not the thickest in the animal world (sperm whales have skin measuring more than a foot thick), but it's tough enough that it's made it extremely difficult for scientists to get a blood sample of the creature.
Sharks are not blind, even though many people thought they were, or that they had very poor eyesight.
Sharks are color blind, but they can still see quite well.
Some sharks must swim constantly in order to keep oxygen-rich water flowing over their gills, but others are able to pass water through their respiratory system by a pumping motion of their pharynx.
This allows them to rest on the sea floor and still breathe.
Some sharks such as the nurse shark have spiracles that force water across their gills allowing for stationary rest.
Sharks do not sleep like humans do, but instead have active and restful periods.
Many scientists now believe that great white sharks are intelligent , highly inquisitive creatures.
Its prey, including seals and dolphins, are very clever animals, and the shark has to have enough brains to outsmart them.