Among the top ten most dangerous marine animals, box jellyfish won the most dangerous title for its unique lethality. There are many kinds of box jellyfish living in the ocean. Although there is no official record, there is a lot of anecdotal evidence that dozens of people or even more than 100 people are killed by box jellyfish every year.

2. Tiger sharks

But the most terrible shark is not a great white shark, but a tiger shark. In fact, more people die from them. Apart from poisonous snakes, there are few animals that can make people naturally afraid, and sharks are one of them.

Tiger sharks can be found in many tropical and temperate waters, especially around the islands in the central Pacific Ocean. Records show that great white sharks attack people more times each year than tiger sharks, but the number of accidents that cause death is not as good as tiger sharks.

3. Stone fish

There are two main reasons why stone fish can rank among the top three: first, they are the most poisonous fish in the world; The other is that they are masters of camouflage in the animal kingdom, and they can "lurk" quietly at the bottom of the sea like stones, waiting for their prey to take the initiative to come to the door.

Although the stone fish will not take the initiative to attack, no one dares to risk close contact with it. The spines on the back of the stone fish can resist attacks by sharks or other carnivores. The released venom will cause temporary paralysis, and if it is not treated, it will die.

4, puffer fish

There is an animal that can kill people even if it is made into delicious food and put on the table. It's puffer fish The puffer fish, also called "puffer fish", carries more toxins than cyanide. Specially trained Japanese chefs will make the safe parts into delicious food, but the tragedy of diners dying of poisoning often happens.

5.sea snakes

Humans have a natural fear of snakes, and it is this fear that makes sea snakes succeed in the list. Although it also releases terrible venom like its counterparts on land, the sea snake's lifestyle is more like a "marine hermit", so it is not very dangerous.

When it comes to toxicity, people often compare sea snakes with cobras. The venom they release can paralyze their prey in just a few seconds and eventually lead to death. Fortunately, they rarely attack humans, preferring to kill eels, shellfish and shrimps.

Extended data:

I. Classification of marine animals:

1, by lifestyle

Marine animals mainly include marine zooplankton, marine swimming animals and marine benthos.

2, according to the system classification

There are dozens of marine animals, which can be divided into three categories: marine invertebrates, marine protozoa and marine vertebrates.

Marine invertebrates account for the vast majority of marine animals, including protozoa, sponges, coelenterates, flatworms, mollusks, arthropods, brachiopods, hairy jaws, brachiopods, echinoderms and semi-vertebrates.

Marine protozoa, animals between vertebrates and invertebrates in the ocean, including urochordates and cephalochordates.

Marine vertebrates, including fish, reptiles, birds and mammals that depend on the sea.

Second, the evolutionary history

The ocean is the oldest habitat, and life originated from the ocean. As early as CAMBRIAN, many representative species of higher taxonomic units such as phylum and class appeared at the same time, but later many species became extinct, leaving only fossils or a few living fossil species, such as nautilus, horseshoe crab and sea bean sprouts. Some of them continue to their descendants, and many differentiate into many varieties.

As far as the phylum of existing animals is concerned, it can be roughly divided into more than 30 phylum (taxonomists still make new discoveries, revise and synthesize this highest taxonomic unit from time to time), among which there are as many as 8 phylum living freely in the ocean, and 14 phylum is only distributed in the ocean; There are 14 phylum in fresh water, but all animals without complete phylum are only produced in fresh water.

There are only 10 species on land, and one of them is only produced on land, so the ocean is the mother of life. In addition, among marine invertebrates, there are many kinds of animal phylum with few classes and special types, which are the result of evolutionary natural selection.

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