1. Great white sharks found off the coast of Seal Island in South Africa will jump 10 feet out of the water to attack unsuspecting seals.
2. Sharks can detect the heartbeats of their prey via electricity-sensing nodules on their noses called ampullae of Lorenzini.
3. There is a one in 3.7 million chance of being killed by a shark.
4. Lantern sharks can glow in the dark.
5. Sharks can heat their eyes, allowing them to see in frigid waters.
6. At more than 20 feet long, great white sharks are the largest predatory fish on earth.
7. The great white has more than 300 razor-sharp teeth in its mouth.
8. Great whites can also detect one drop of blood in 25 gallons of water and can sense tiny amounts of blood in the water from three miles away.
9. The whale shark is the largest fish in the sea at 40 feet long — the size of a school bus.
10. Despite its massive size, the whale shark is a filter feeder, subsisting on tiny, microscopic plankton.
11. Some female sharks retain sperm in their bodies after mating and will use it to reproduce later on.
12. Sharks can live in freshwater by absorbing extra water and then urinating it into the streams around them.
13. Some female sharks can reproduce without any contact from a male, which is known as parthenogenesis.
14. When gray nurse sharks are born, the first baby shark to develop consumes its siblings as they hatch.
15. Extracts from a shark’s gall bladder are used in the treatment of both eye cataracts and acne.
16. In 17th-century France, shark brain was consumed by pregnant women to ease the pain of childbirth.
17. The goblin shark lives along outer continental shelves and underwater mountain ranges in areas too deep for human exploration.
18. The hammerhead shark’s odd-shaped head not only allows for a better visual range than other sharks, but also spreads its sensory organs, allowing it to better detect prey.
19. Sharks have tooth-shaped scales which allow them to move swiftly through water without collecting barnacles and algae.
20. A shark’s bite can generate 40,000 pounds per square inch of pressure.
21. A female whale shark can give birth to 300 live shark pups in one litter.
22. Hammerhead sharks can easily adapt to a change in water temperature and can be found from polar regions to the Florida coast.
23. The basking shark, which is a filter-feeder like the whale shark, can grow to 33 feet long and can weigh as much as a four-passenger airplane.
24. Thresher sharks flail their tails to stun prey in a movement similar to the cracking of a whip.
25. Blue sharks will overeat until they regurgitate their food, and then will continue to eat.
26. Some female sharks have a gestation period of two years.
27. In 1978, archaeologists uncovered remnants of shark bodies under the ruins of the Aztec Great Temple.
28. Sharks can hear sounds from more than 800 feet away.
29. Great white sharks eat around 11 tons of food each year. In comparison, an adult human eats around half a ton.
30. Some female sharks use sperm from several different males to reproduce. Pups are half-siblings even though they are born in the same litter.
31. Mako sharks have been clocked swimming at speeds of 43 mph.
32. Sharks’ sight lines span nearly 360 degrees. They have only two blind spots: one in front of the snout and the other directly behind the head.
33. A great white shark will roll its eyes into the back of its head when attacking to protect its eyes from debris.
34. Sharks are opportunistic eaters, eating whether or not they are hungry.
35. Scientists only discovered the megamouth shark in 1976. Since then, there have only been 41 known sightings of the species.
36. The skin of a female shark is thicker than a male’s because males bite the female during mating.
37. Angel sharks are also known as sand devils because they dig themselves into the ocean bottom and wait for unsuspecting fish to pass before attacking.
38. Out of the 350 known species of shark, only 20 are known to attack humans.
39. By comparison, humans kill 100 million sharks every year — or 11,000 every hour.
40. The Greenland shark is one of the slowest-moving fish in the ocean. It has been found with reindeer, polar bears, and fast-moving seals in its stomach.
41. Shark teeth are covered in fluoride, making them cavity-resistant.
42. Tiger sharks have such strong bites that they can break through the shell of a sea turtle.
43. The tiger shark is also known as the “wastebasket of the sea” because it is such an indiscriminate eater — old tires and license plates have even been found in its stomach.
44. Some pups chew their way out of the egg to enter the ocean before the mother even gives birth.
45. The megalodon, which lived from 16 million to two million years ago, grew to up to 50 feet long and had the strongest bite of any living creature ever.
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