Which marine life is the most dangerous and what animals are the largest in the ocean

4 of the largest sea creatures that really exist.

Box Jellyfish: The Australian box jellyfish has dozens of tentacles, each up to 15 feet long, and contains enough toxins to kill 60 people. The stinger of a box jellyfish called Chironex Fleckeri is capable of killing a person in as little as 3 minutes.

Box jellyfish living in Hawaii, Florida, and other parts of the United States can cause heart failure in people who are stabbed. Tiger sharks: The National Oceanic and Atmospheric Administration says tiger sharks can bite almost anything, including fish, seals, birds, squid, baby sharks, dolphins, license plates and even old tires.

They can reach up to 18 feet (about 1 meter) in length and weigh up to 1 ton, making them well-deserved "killers of the sea". Demoiselle: Also known as the "lion fish", it is a popular pet in domestic fish tanks.

This fish may seem docile, but the scalloped spines are surprisingly poisonous. The National Oceanic and Atmospheric Administration says that while it does not cause fatal injuries to humans, being pricked by a spiny can also cause headaches, vomiting and difficulty breathing.

Shark jellyfish, dolphins, whales, seahorses, octopus, squid, lobsters, sea lions, starfish, corals, crabs, octopus, lobsters, shellfish, sharks, sea cucumbers, squid, shrimps, dolphins, goldfish, white ribbon fish, oysters, corals, sea urchins, shrimps, jellyfish, seahorses, squid, octopus, manatees, lionfish, stingrays, whales, starfish, dolphins, sharks, turtles, hermit crabs, sea otters, fur seals, seals, sea anemones, sponges, hail crabs, pipemouth fish, Clownfish, sea lions, goldfish, butterflyfish, flounder, thorny river fish, sea snakes.

After decades of investigation and research by marine science and technology workers, 20,278 species of marine organisms have been recorded in the waters under the jurisdiction of China. These sea creatures belong to 5 kingdoms and 44 phyla. Among them, the animal kingdom has the largest number of species (12,794 species) and the prokaryotic kingdom has the least (229 species).

China's marine species account for about 10% of the total number of marine species in the world. According to the distribution of marine organisms in China's waters, they can be roughly divided into two categories: marine organisms in waters and marine organisms in tidal flats. Among the marine life in the water, fish, cephalopods (such as the cuttlefish, also called cuttlefish) and shrimp and crabs are the most important marine organisms.

Among them, fish have the largest variety and quantity, and constitute the main body of marine life in the waters. The distribution trend of marine species in the waters is more in the south and less in the north, that is, there are more species in the South China Sea, while there are fewer species in the Yellow Sea and Bohai Sea. Species account for about 10% of the total number of species in the world, and the number accounts for 50% According to the latest survey data, there are more than 1,580 species of marine organisms distributed on China's tidal flats.

Among them, molluscs (that is, what we usually call shellfish) are the most, with 513 species, followed by seaweed with 358 species, crustaceans (mainly shrimp and crabs) with 308 species, and there are few other taxa. The number of species of organisms along the tidal flats in China is the same as that of marine organisms, and it is gradually increasing from north to south. Scientists from all over the world are currently engaged in an unprecedented collaborative project to identify and compile an inventory of all marine life.

How many species of life are there in the ocean? A survey that synthesizes global ocean data has been released. There are currently 15,304 registered species of marine fish, and it is estimated that there will be about 20,000 species of marine fish in the end.

There are currently 210,000 known species of marine life, and the actual number is expected to be more than 10 times that number, or 2.1 million species. The project, which scientists are currently working on, is called the Marine Life Census, which is expected to take 10 years and cost at least $1 billion, with more than 300 scientists from 53 countries participating in this unprecedented collaboration that allows marine scientists from every corner of the world to work together. Since 2000, an average of 3 new marine species have been discovered every week.

According to estimates from the research program, about 5,000 species of marine fish and thousands of other diverse species of marine life remain undiscovered.

Marine mammals, there are 39 species of various sea mammals in China. Such as: all kinds of cetaceans, dolphins, seals, sea lions, dugongs, etc.

2. Marine reptiles, reptiles are ectotherms that reproduce on land with scales. 3. Marine birds, there are not many species of marine birds, and a total of 183 species of seabirds have been recorded in the China Sea. Such as red-throated loon, black-footed albatross, petrel, small ** bird, puffin, egret, seagull and so on.

4. Marine fishes, fishes are the lowest group of vertebrates. In China's waters, 3,023 species of marine fish have been recorded, including 237 species of cartilaginous fishes and 2,786 species of bony fishes, accounting for about 1 of all marine species of marine organisms in ChinaSuch as horseshoe crabs, shrimps, crabs, etc.

6. Marine molluscs, a total of 2557 species of molluscs of various types have been recorded in the China Sea, accounting for about 1 8Such as turtles, mussels, pearl oysters, scallops, oysters, clams, squid, octopus, etc. 7. Marine coelenterates, coelenterates are also called cnidarians because of their unique cnidarians.

At present, a total of 1010 species of marine coelenterates have been recorded in the China Sea, which belong to the three classes of the phylum Coelenterates. 8. Marine plants, marine plants can be simply divided into two categories: lower algae plants and higher seed plants.

The biological species in China's waters have obvious characteristics of China's sea area, which is manifested in the fact that there are not only many marine species in the world, but also many ancient relict species that have long been extinct in other seas of the northern hemisphere, and some primitive and isolated groups that belong to evolution. Among them, the primitive species include nautilus, Chinese horseshoe crab, stigma, Wenchang fish, sea bean sprouts and sour shellfish. It is also abundant in isolated taxa, with 80 species of fish alone.