What is some information on sharks?

Sharks Breath Throught There Gills.

Sharks Can't Swim Backwards.

Sharks Swim By Using Their Tale.

Sharks Favourite Meal Is Seal.

Sharks Have Been Around For About 400 Million Years.

Sharks Belong To The Class Of Fish, Chondrichthyes.

Sharks Have The Most Powerful Jaws On The Planet.

There Are Only About 100 Shark Attacks A Year.

Only 10 Attacks Normaly Kill Humans.

Baby Sharks Are Called Pups.

Biggest Shark: Whale Shark.

Smallest Shark: Dwarf Lanternfish.

Most Dangerous: White - Tipped Sharks.

Fastest Shark: Mako Sharks And Blue Sharks.

Largest Mouth: Whale Shark.

Strongest Bite: Dusky Shark.

Most Common: Piked Dogfish Shark.

Humans Know About 457 Different Species Of Shark.

Sharks Do Not Have Bones They Have Cartilage.

The Swell Shark (Found In New Zealand) Barks Like A Dog.

Sharks Were Around Before Dinosaurs!

Sharks Become Immobile When Upside Down.

Species:

Angel Shark, Saw Shark, Dogfish Shark, Bramble Shark, Greenland Shark, Bull Shark, Caribean Reef Shark, Tiger Shark, Lemon Shark, Blue Shark, Mako Shark, Milk Shark, White Tipped Shark, Hammerhead Shark, Barbelled Shark, Swell Shark, Silky Shark, Leopard Shark, Soupfin Shark, Makeral Shark, Great White Shark, Basking Shark, Goblin Shark, Thresher Shark, Sand Tiger Shark, Crocodile Shark, Megamouth Shark, Nurse Shark, Whale Shark, Carpet Shark, Bamboo Shark, Zebra Shark, Blind Shark, California Horn Shark, Bullhead Shark, Frilled Shark And Many More

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the earliest- known shark fossila come from rock layers of the early devonian period (410-355 )mya.