Sharks Jeffery tubbs

Being the top predators of the oceans natural food chain, sharks belong to the subclass of Elasmobrachii, part of the Chondrichthyes. Some fossil records show that sharks lived from about 300 million years ago and dating back to the Devonian Age. Knowing sharks, humans are not on there diet but they usually attack from below or behind. Sharks have spindle shaped bodies for fast swimming so they can attack their prey. Smell is a shark's most acute sense. It can detect blood from miles away using a sense called ampullae.

There are about 465 to 500 shark species in the oceans. Some sharks include the Great White, Whale Shark, Shortfin Mako Shark, Spiny Dogfish, Hammerheads, and the Spined Pygmy shark. The Great White Shark, or the Maneater or White Death shark, is considered to be the most dangerous shark in the world. White sharks have a maximum size of at least 19.7 feet and large ones can weigh as much as 4,800 pounds. Even remains of sheep, horses, dogs, and rarely humans have been found in their stomachs! The whale shark is considered to be the the largest fish in world while the spined pygmy shark is the one of the smallest.

Fun fact- Did you know that more people are killed by falling coconuts in Asia only then Shark attacks in the world?

Fun fact 2- Did you know that Hammerhead's shaped heads are called ''cephalofoils''?

Fun fact 3- Did you know that the Shortfin Mako Shark is the fastest shark to date going at around 65 mph?

Fun fact 4- Did you know that a Whale Shark can grow as large as a school bus?

Sharks can have 1 to 100 babies at a time! There are 3 ways sharks are born. One called intrauterine cannibalism states that some shark embryos develop teeth and eat their unborn sibling! On teeth, sharks can have up to 3,000 teeth and can have up to 20,000 teeth in a lifetime! The Bite Force of a Great White is 4,000 PSI while a Tiger's is 1,000 PSI (Pounds per Square Inch). The jaws in sharks are not actually connected to their skull and their teeth are entrenched in the flesh! Sharks have a protrusile jaw is what gives modern-day sharks their extremely powerful bite! Sharks actually have the strongest jaw on the planet! Sharks also have great senses. They can detect sounds from 800 feet away.

Even with sharks range of size as 6 inches to 45 feet, they can still swim an average of 8km an hour which is about 10 Football fields. Sharks need to keep moving often or they will die. Sharks breathe through a series of 5 to 7 gill slits located on each on each side of their body.

Fun Fact 1- Did you know that the Portugese recently discovered megamouth sharks that live in the deepest parts of the ocean?

Fun Fact 2- Did you know that there is an average of 4.2 fatal shark attacks around the globe?

Fun Fact 3- Did you know that in many species of sharks the female are larger than the male?

Fun Fact 4- Did you know that tires, license plates, and gas tanks have been found in tiger sharks?

Even though that Sharks exist in all seas and that Great Whites and Spiny Dogfishes can live up to 100 years, research has shown that there has been a massive depletion of sharks that has cascading effects throughout the ocean's ecosystem. Luckily, Sharks have a natural source of Vitamin A which is why they are still around,but humans kill more than 100 million sharks per year and people don't see it has an effect. The Shortfin Mako shark is even a highly priced sport fish! In my opinion, since sharks have skeletons composed of cartilage, they can can be killed pretty easily. The opposite way around, Sharks are great hunters. Because of their teeth, sharks can eliminate a fish easily. They actually shed their teeth constantly. Sharks are one of the greatest hunters of the sea.

Living in every sea, sharks still have a low human attack rate. Even with Greenland Sharks that live in the Arctic waters, only 30 to 50 shark attacks are reported each year.

Works Cited

"The 15 Most Surprising Shark Facts." Discovery. 05 June 2015. Web. 20 Apr. 2017.

"Basic Facts About Sharks." Defenders of Wildlife. 19 Sept. 2016. Web. 20 Apr. 2017.

"Here You Can Learn The Coolest Facts About Sharks - Shark Sider." Welcome To SharkSider.com! Web. 20 Apr. 2017.

"SHARK FACT INDEX." Shark Facts. Web. 20 Apr. 2017.

"Shark Facts • Interesting Information & Facts About Sharks." Shark Facts. Web. 20 Apr. 2017.

"Shark Guardian - 100 Awesome Shark Facts." SHARK & MARINE CONSERVATION WORLDWIDE. Web. 20 Apr. 2017.

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