Did you know that there are 375 different kinds of sharks?
The Bull Shark is one of the only sharks that can live in both saltwater and freshwater, it has been known to attack people in rivers hundreds of miles upstream from the ocean. Bull sharks get their name from their tendency to head-butt their prey before attacking as well as other things according to National Geographic. Bull Sharks are also one of the three most likely sharks to attack humans along with The Great White and Tiger shark. They can also grow from 7-12 feet long and weigh up to 200-500 lbs. The average lifespan of a Bull Shark is 12 years.
There are few creature that strike fear into people more than the Great White, while it is true they can attack people, it is very rare and even rarer for these attacks to be fatal. The great white shark averages 15 feet in length, but some have been recorded as large as 20 feet long, they can also generally weigh up to 5000 lbs. They can also reach speeds up 15 mph, which if you think about it is really fast for being in water. Great Whites can also live an average lifespan of 70 years!
Not much is known about the mating habits of great white sharks. What is known is that after mating, the female develops several eggs which hatch in her womb. The newly-hatched shark pups feed on unfertilized eggs in the womb as they develop before being born (Ewwww!). In general, the mother gives birth to a litter of two to ten pups, each of which average 5 feet in length (Imagine having a baby that was 5 foot tall at birth!)
Tiger Sharks are named for the dark, vertical stripes that are mainly found on juveniles. As they mature, these lines begin to fade and almost disappear.
These large, blunt-nosed predators have a duly earned reputation as man-eaters, they are second only to great whites in attacking people. But because they have a near completely undiscerning palate, they are not likely to swim away after biting a human, as great whites frequently do.
Their teeth are sharp and highly serrated they have powerful jaws that allow them to crack the shells of sea turtles and clams. The stomach contents of captured tiger sharks have included stingrays, sea snakes, seals, birds, squids, and even license plates and old tires (Shows how much junk people throw into the ocean). Tiger sharks are common in tropical waters throughout the world. Large adults can grow to as much as 20 to 25 feet in length and weigh more than 1,900 pounds. Their average lifespan is 50 years.
Tigers sharks are heavily harvested for their fins, skin, and flesh, and their livers contain high levels of vitamin A, which is processed into vitamin oil. They have extremely low repopulation rates, and therefore may be highly susceptible to fishing pressure. They are listed as near threatened throughout their range.