What do microbes on the seabed look like?

What is the biggest creature on the bottom of the sea?

At present, the largest known marine animal is the blue whale, which has a lot of materials.

As for the largest marine life, it should be giant algae.

Macroalgae belong to brown algae, which is the longest group in the algae world. Most of the giant algae can grow to tens of meters, and the longest can even reach 200 to 300 meters, weighing 200 kilograms. The algae body is fixed on the reef by a fixer with a length exceeding 1 m. The center of the giant algae is a trunk with more than 100 branched petioles with small leaves, some of which are more than 1 m long and 6 cm wide to 17 cm. There are air bags on the leaves, which can generate enough buoyancy to lift the leaves or even the whole algae. These airbags are regularly arranged on both sides of the main vein on the blade. In places where giant algae flourish, huge leaves can cover hundreds of square kilometers of sea surface layer by layer. Giant algae is one of the fastest growing plants in the world. Under suitable conditions, each giant seaweed can grow 30 to 60 centimeters a day. Within a year, a giant seaweed can grow to more than 50 meters. Giant algae growing in the tropics grow all year round, and fishermen who collect giant algae at the seaside can harvest them three or four times a year. The life span of giant algae is generally between 4 and 8 years. The longest-lived macroalgae can grow for 12 years. If you plant 1000 macroalgae per hectare of sea surface, you can harvest 750 ~ 1200 tons of fresh macroalgae every year.

People often donate money to disaster areas when they win the lottery. If you won 50 million, would you do that?

number

People are all equal, and they don't need sympathy from others, and they don't need to sympathize with others. Whoever it is for, it's pathetic!

How many creatures exist in the deepest part of life on the seabed at present? What creature is it?

10000m, there are too many microbes, I don't know the name. There are also fish. I don't know the name.

Generally live near the crater. Feeding on sulfides.

I don't know the rest.

Distribution of marine microorganisms

Marine bacteria are widely distributed and abundant, and play a special role in marine ecosystem. The law of bacterial quantity distribution in the ocean is as follows: the bacterial density in coastal waters is higher than that in the ocean, especially in inner bays and estuaries; The bacterial density at the interface between surface water and sediment is higher than that in deep water, and the sediment is generally higher than that in seawater. The bacterial density in different types of sediments varies greatly, and the bacterial density in general soil is higher than that in sand. The density of bacteria in marine seawater is low, and sometimes 1 colony cannot be separated from each milliliter of seawater. Therefore, membrane filtration method must be adopted: a certain volume of seawater samples are filtered by a membrane with a pore size of 0.2 micron, so that bacteria in the samples gather on the membrane, and then they are counted by direct microscopic counting method or culture method. The density of bacteria in marine seawater is generally several to dozens per 40 ml. In marine investigation, it is often found that the number of bacteria in a certain water layer increases sharply, and this micro-distribution phenomenon is mainly determined by the distribution of organic matter in seawater. Generally, after the red tide, it is often accompanied by the peak of bacterial growth. Some people try to use the distribution of microorganisms to indicate the characteristics of organic matter accumulation at the interface of different water masses or thermoclines, and then analyze the law of water mass source or transfer. The density of yeast in marine seawater is 5 ~ 10/L. It can reach hundreds to thousands per liter in coastal seawater. Marine yeasts are mainly distributed on fresh or decaying marine animals and plants. Most marine yeasts come from land, and only a few species are considered as marine species. The distribution of yeast in the ocean is second only to that of marine bacteria. Gram-negative bacilli are the main species in seawater, and there are many genera such as Pseudomonas 10. On the contrary, there are more gram-positive bacteria in seabed sedimentary soil. Bacillus is the most common genus in continental shelf sediments. Marine fungi are mostly distributed on various substrates in coastal waters. According to their living objects, they can be divided into three categories: parasitic on animals and plants, attached to algae, and living on wood or other marine substrates. Some fungi are special flora on tropical mangroves. There is a close relationship between nutrition supply and demand between some algae and fungi, which is called semi-symbiotic relationship between algae and fungi.

What was the ancient seabed like?

The ocean that has not been conquered by human beings so far accounts for 3/4 of the earth's surface, with a seawater volume of 654.38+0.4 billion cubic kilometers and an average depth of 3,700 meters. The intricate food web of the ocean breeds a wide variety of marine life, which is much more complicated than any ecosystem on land, from sulfur-eating microorganisms and bacteria living on the edge of submarine crater to various deep-sea fish, their fluorescence can illuminate well. It attracts many creatures to eat. In some places, there may even be a new species called "sea monster", including the 20-meter-long horseshoe crab. Scientific research tells us that in this underwater world, the potential economic value is immeasurable: the vortex with huge energy affects the weather in most parts of the world, and it can be predicted if we can understand their formation mechanism and laws. Bacteria, fish and plants in the deep sea may become the source of magical drugs to protect human health and longevity. It is estimated that in the next few decades, the benefits brought by the ocean will far exceed the benefits brought by human exploration of space at present. If people can get in and out of the seabed freely and safely, their economic benefits will be immediate. However, reaching the bottom of the sea is the same as reaching outer space. People can't reach the bottom of the sea without special equipment. Common sense tells us that without the help of oxygen tanks. With the continuous diving into the water, the pressure is getting bigger and bigger. People's inner ear, lungs and some passages will feel pressure, which is painful. Low underwater temperature will quickly absorb human body heat, making it difficult for people to stay in water below 3 meters for 2 ~ 3 minutes. For these reasons, contemporary deep-sea exploration has to wait for the development of two key technologies: deep-sea spherical submersible and deep-water steel ball submersible bound by chain. People who can swim have been thinking. It has been like this for thousands of years. In ancient Greece, divers got oxygen from bottles filled with air, but in modern times, divers use compressed air to dive into human bodies. Usually, people can dive to a depth of 30 meters. Even the most experienced people who use underwater breathing apparatus dare not venture to dive below 45 meters, because the increase of deep diving pressure and the pressure change in the process of floating to the surface lead to decompression sickness and even death. Use a sealed diving suit. It can only dive to a depth of 440 meters. The spherical deep-sea submersible created a depth of 923 meters, but it was very difficult to operate. Later, a small deep-sea submarine was invented, but it can only be used for scientific research. Advanced deep-sea submarines are equipped with underwater cameras, specimen collection baskets and robotic arms operated by human hands. The practice of deep-sea submersible has been answered positively. The United States, France, Japan, Russia and other countries developed deep-sea submarines for different purposes. Collected data samples of animals, plants, rocks and water samples in the deep sea, which opened a new era of deep sea exploration. People have gained a lot of information in the deep-sea world, which has changed some traditional viewpoints of biology, geology and marine geography. Scientists look at the changing laws of wind and water flow with new eyes. El Nino in the Pacific Ocean has done great harm to commercially valuable fish resources, and at the same time, it will also induce strange changes in the climate on the earth. The instability of ocean circulation may lead to global climate change, or make the stable climate on the earth slowly disappear. Scientists also realize that the bottom of the ocean is not flat, it is more undulating than our land topography, and its canyons can accommodate the Himalayas. What's even more amazing is that there is a unique and global mountain range of 60,000 kilometers at the bottom of the sea. Like a giant snake, it winds through the Atlantic Ocean, the Pacific Ocean, the Indian Ocean and the Arctic Ocean. Scientists call this mountain at the bottom of the ocean "the mid-ocean ridge". By the end of 1970s, when geologists carefully studied the mountains in the middle of the ocean, they were more convinced of the theory of continental plate structure. According to this theory, the earth's surface is not a single stone shell, but consists of several huge plate structures, the smallest of which is several thousand square kilometers, floating on the mantle. The uplift of the mid-ocean ridge may be where the crust first formed. The new plate structure may be caused by the internal force of the crust below the seabed before its formation. Rock samples collected from the mid-Atlantic ridge prove this. This is the theory of plate structure ...

What is a creature that looks like a stone in the sea? 10.

Call for fish

[1] is a bony fish, belonging to (ānkāng) order and family. It is a worldwide fish, distributed in the Atlantic Ocean, the Pacific Ocean and the Indian Ocean, with a wide variety.

(5 sheets)

Sample: The largest one can reach1-1.5m. There are three species in China, one is called yellow, the other is called black, and the other is called Sun. Barry with a big mouth has two rows of hard teeth and looks very ugly. He is generally 40~60 cm long and weighs 300~800 grams. The former has two more rows of mandibular teeth. The mouth is white, with skin wrinkles protruding from the front end, 8 ~ 1 1 arm fin; The latter has more than three rows of mandibular teeth, black and white circular markings in the mouth and 6 ~ 7 arm fins. This kind of fish is good at camouflage, which is not easy to be found, and its body is pointed back in a row. The head is big, looking down, the body is soft and scaly, and the back is brown, like a frying pan with a handle. The anterior spine of dorsal fin stretches like a fishing rod, with skin wrinkles protruding outward at the front end, which looks like bait. The head is particularly large and flat, the mouth is wide, the ventral fin is short and the caudal fin has two dorsal fins. The first dorsal fin is different from ordinary fish, and consists of 5 ~ 6 separate fins. Shake with this bait, lure the prey, and then swallow it in one gulp. The pectoral fin is developed and can move on the seabed like a foot. [2]