2. Great white sharks are warm-blooded animals and can live in waters with different temperatures, from the coastal areas of Australia to South Africa, from California to the northern United States. Because warm-blooded animals are full of physical strength, great white sharks can move freely in the water, and they can be seen at the water surface or at a depth of 820 feet. Great white sharks are gregarious fish, but they don't hunt in groups. They are well aware of their destructive power, so they just touch each other lightly to avoid fierce fighting, so as not to cause permanent damage to each other. Because great white sharks have strong predation ability and adaptability, they live longer than some people and can live for 70 years.
3. Pacific Giant Octopus is a carnivorous octopus, with a body length of 10- 16 feet and a weight of 100 pounds. The largest Pacific giant octopus on record is 30 feet wide and weighs more than 600 pounds. Usually, Pacific giant octopus feeds on shrimp, clams and lobsters, but at the same time, they also have the ability to hunt sharks. Usually they bite through their prey with their mouths, tear it apart and swallow it.
Tiger shark is a carnivorous fish, so it is named because it was covered with stripes when it was young. Tiger sharks can grow to 14 feet long, and the largest recorded tiger shark weighs 1400 pounds. They have sharp teeth and powerful jaws, and their bite force is big enough to crush the shells of turtles, which is by no means what ordinary marine life can do. Tiger sharks, great white sharks and bull sharks are all famous for attacking humans. However, tiger sharks are not picky eaters. Great white sharks usually swim away in one bite, but tiger sharks kill humans. Tiger sharks are not picky eaters. They will eat stingrays, seals, seabirds and even old tires.
The king squid is the most mysterious creature in the ocean and the largest invertebrate on the earth. The king squid is generally about 18 meters long, and the largest king squid is 18 meters long and weighs 900 kilograms. The king squid always comes and goes in its own habitat, so it is difficult to study it. At present, we can only understand squid washed ashore by sea water after death. It was not until 2004 that the live squid was photographed for the first time. We have seen king squid on beaches all over the world, but it is still difficult to know exactly how far they can swim or where their habitat is. The eyes of these giant squid are amazing because they live in the deep sea all the year round and can't see the light. We know little about the king squid, but we can speculate that they can even kill and eat young whales if given the chance, which means that the giant tentacles of the king squid must be very strong.
6. The only marine creature that is longer than the imagined king squid is the lionhead jellyfish. Its antenna length can reach 36 meters, which is longer than the average body length of the blue whale! The water content of lion mane jellyfish is 95%. They have no bones or blood, or even brains. However, jellyfish are the carnivores that live in the sea for the longest time. Jellyfish lived in the ocean about 650 million years ago, even before dinosaurs appeared on the earth. Lionhead jellyfish will prey on fish and even other jellyfish. Although they have no brains, they are all good swimmers, so they are easy to prey. Strong swimming skills enable them to escape the clutches of natural enemies and easily hunt their own food. Unlike other marine life, jellyfish have no teeth. They sting their prey with poisonous tentacles first, and then have a full meal after their prey is paralyzed.
7. The sperm whale with an adult weight of 35 tons is not the largest whale in the ocean, but this does not prevent them from becoming powerful creatures. Sperm whales are the largest brains of all known creatures on earth. Sperm whales have excellent diving ability. They can search for food in more than 3,000 feet of water. In view of the nature of mammals, they must hold their breath and keep the oxygen content in their bodies within 90 minutes of their return trip! Sperm whales are widely distributed in major sea areas and like to eat squid. Sperm whales prey on squid in a wonderful way: they suddenly turn over and dive, use the current to form a vacuum, and rely on this water pressure to suck squid 2-3 feet away from themselves into their mouths. Many squid can easily find whales and their vacuum mouths and fight back in time. Sperm whales seem to enjoy it. The sucker marks left by some sperm whales can show that giant squid will fight sperm whales, and the combat effectiveness of giant squid should not be underestimated.
8. Bull shark, tiger shark and lemon shark are close relatives, and they are all smaller members of the shark family. They can grow to 1 1.5 feet long and weigh 200 to 500 tons. They are fierce by nature and like to live in shallow waters, which is unfortunate news for people living in coastal areas. Bull sharks even haunt the Amazon River because they can live in fresh water like other species. It is this habit that makes the bull shark the most dangerous shark in the world. Bull sharks prey on anything they can catch, including other sharks. They often appear in waters frequented by human beings, and will not attack humans for predation, although such attacks occasionally occur. Although bull sharks are not as big as other sharks, they are more fierce than other big sharks, including their dangerous cousins-great white sharks and tiger sharks. The biting force of bull sharks can reach 6000 Newton, which is enough for hunting and eating. It's hard to imagine how they practiced this pair of "good teeth". Judging from the types of prey that bull sharks prey on, they don't need such a strong bite force. It is speculated that perhaps this little shark has been given a greater advantage, so that they can prey on more kinds of prey. Another possibility is that bull sharks have poor eyesight and become extremely aggressive in order to adapt to the predation environment. Whatever the reason, one thing is certain: sharks can't judge a book by its cover.
9. The blue whale is the largest mammal on earth. Although they are endangered, we can still see them swimming in the sea. The tongue of a blue whale is equivalent to the weight of an elephant, and the heart is equivalent to the weight of a Volkswagen. The overall weight is as high as 200 tons, nearly the weight of 33 elephants!
10, Crocodiles Crocodiles are the largest crocodiles in the world, with a body length of 17 feet and a weight of 1000 pounds, but giant crocodiles with a body length of 23 feet and a weight of 2,000 pounds have been found. Crocodiles are often found along the South Pacific coast of India, Southeast Asia and northern Australia. Although most of them live in shallow water, you can also find them in fresh water. Crocodiles in the Gulf are good at camouflage. They will lurk underwater, waiting for their prey to appear. They can travel at the speed of18km per hour in water, but the speed is very slow on land. Crocodiles will also swim across the vast sea and open up new territories. At the same time, crocodiles in the Gulf also live quite long, and some can live to 100 years old.