The activity method of benthos can climb trees. The main respiratory organ of fish living in water is gill. When the fish leaves the water, the gills become dry and stick together, which hinders breathing and stops life. However, there is a kind of mudskipper that can adapt to the amphibious life along the coast of China. The body length of the mudskipper is about 10 cm. Its gill cavity is very large, and its gill cover is sealed, which can store a lot of air. Its panel is covered with blood vessels, which can directly exchange gas with air. Its caudal fin is also an auxiliary respiratory organ. These unique physiological phenomena enable them to live in the air for a long time without water. Mud-coated fish living in tropical areas often jump around on the beach, preferring to climb to the roots of mangroves to catch insects to eat. Therefore, people call it a "tree-climbing fish". In addition, the mudskipper also developed pectoral fins, much like the appendages of higher animals. When it is attacked by the enemy, it moves faster than people walk. Swimming champion-swordfish Animals that live in water swim at different speeds because of different kinds and lifestyles. 1967, the Soviet Union (now the Commonwealth of Independent States) published a "speed comparison table of animals in the sea". Among them, whales: porpoises 55 km/h, fin whales 50 km/h, killer whales 65 km/h and sperm whales 22 km/h; Pinpoda: seal 354 Li/h, walrus18-20km/h; Fish: swordfish 130km/h, swordfish 120km/h, flying fish 65km/h, shark 40km/h; Cephalopods: squid 4 km/h, cuttlefish 26 km/h, octopus 15 km/h From this statistical table, swordfish swims fastest. Why does swordfish swim at such a high speed? It turns out that it has a very typical streamlined body, a smooth body surface, a long and sharp upper jaw, and a strong tail handle can produce great impetus. When it swims forward at high speed, the long jaw like a spear plays the role of splitting water. Swordfish moves at a high speed of 130 km per hour, and its hard upper jaw can pierce the thick layer of the bottom of the ship! The hippocampus swimming upright has a strange shape, and its head is at right angles to its body. Swimming slowly in the sea like a horse's head. Its swimming posture is very special, with its head up and its body slightly tilted, and it can swim freely in the water with the help of dorsal fin movement. When you are tired of swimming, wrap the tail with bending function around the stems and branches of seaweed to rest. In addition, it is very interesting that it is not the mother who bears the responsibility of reproduction in the hippocampus family, but the "father" of the hippocampus-the male hippocampus, whose abdomen has an abdominal bag composed of panel folds. The female seahorse lays her eggs in the belly pocket of the male seahorse, which is fertilized by * * *, and then hatches in the belly pocket of the "father" until the baby seahorse is born. A seahorse "father" can give birth to hundreds of baby seahorses at a time. Free-swimming sucker The sucker formed by the first dorsal fin on the back of the fish head is long and has 22 ~ 26 pairs of lateral cartilaginous plates. The second dorsal segment is the same length as the base of gluteal fin, with 35 ~ 40 fins. The tail fin of young fish is pointed, and the adult fish gradually becomes concave fork-shaped. Generally, the body length is 220 ~ 450 mm, and the maximum length is no more than 900 mm Although the swimming ability is poor, it is distributed all over the world. Mainly adsorbed on the abdomen of big sharks or marine animals with strong swimming ability, and sometimes adsorbed on the bottom of ships. It doesn't need to swim by itself, but is taken to the ocean of the world. When it reaches the sea area rich in bait, it leaves the host and eats. Then it will be adsorbed on a new host and continue to move to another sea area. Widely distributed in tropical, subtropical and temperate waters of the world. It is produced along the coast of China. If it's okay, thank you.
Seek the action mode of various benthic animals. Starfish squirm, jellyfish swim by recoil. Microorganisms drift with ocean currents. Shrimp and crab crawl, the stranger moves with the main body, and more fins swim.
The activity mode of benthos: fish swimming and crab crawling.
Who has photos of underwater diving? It is better to have humans and underwater animals. . . . . Google search "diving" pictures, there will be some better pictures.
Underwater animals (ordinary animals) move quickly! Swimming or crawling or floating
One day, the kitten saw a ball of wool on the ground and felt very novel. So, it stretched out its claws and gently pulled out the wool ball, and the wool ball rolled up, and the kitten became more and more excited. Look at the kitten's serious expression, as if thinking: "Look where you are going, I must catch you!" " "The kitten chased after it. Finally, the wool ball rolled smaller and smaller and became a pile of thread. The kitten couldn't figure out why she disappeared after chasing the wool ball. The kitten shook its paw, looked at the wool on the ground and left helplessly.
Little squirrel
Today, I went home happily and saw two lovely little squirrels. Their delicate little faces are inlaid with round eyes and triangular ears. They are all black, but there are some white patterns. One of them is Qiqi and the other is Jingjing.
Squirrels are interesting when they eat. They always sit on the upper body, holding food in their hands and putting it by their mouths. When eating corn, they take the corn kernels off with their hands and feet, and eat them slowly one by one, eating only meat and not skin. And they eat a little here and a little there, which is really a portrayal of monkeys moving corn. Little squirrels are more interesting when they sleep. One of them lay like a puppy, and the other curled up like a hedgehog. All you have to do is walk over and make a noise, and they will wake up immediately. "They are so vigilant!" I always tell my mother that. Mother always replied, "Because nature is the place where the fittest survive." Squirrels will be eaten if they are not careful. ""isn't the little squirrel sleeping well? What a pity! " Mother always smiles faintly.
An article describing an animal with blue eyes. You look at it, as if through the blue lens-like pupil, you see the vast sea and the vast sky. White clothing makes people feel that it not only has noble charm, but also has agility in behavior and wisdom in thinking; The light and silent footsteps are even more elegant, so that human beings must learn to wear the most fashionable clothes on the runway. This is a beautiful Persian cat. Haha, what's up?
Data of benthos The marine food chain refers to the demand relationship between predators and prey in the marine community, starting from autotrophic bacteria or organic matter formed by photosynthesis, and passing through plankton, herbivores and carnivores at all levels. The structure of the food chain is similar to a pyramid, with a large base, and each level is smaller than the previous level. The whole network consists of various complex food chains. For example, the most common: algae-small fish, shrimp-shark, mackerel, tuna and so on. From the perspective of life evolution, although scholars of different schools have different views on the origin of life, the ocean is still the mainstream view. Before the formation of the earth, there were many asteroids orbiting the sun in the universe, and the planets would collide with each other. The original earth was a fireball produced by impact. The ground is covered with volcanoes and hot lava, and the sky is filled with dense water vapor from the interior of the earth, forming the early atmosphere of the earth. With the decrease of the number of collisions, the earth began to cool gradually from the outside to the inside, and a thin crust was formed on the surface; The water vapor in the atmosphere condenses into rain and falls on the surface, and the rain accumulates in the depression for a long time, forming a primitive ocean. Why do we believe that early life appeared in the ocean (in fact, "in water" is more appropriate), because the environment at that time, water was more friendly than land. The temperature of the land is either cold or hot; It's either strong wind or heavy rain, which changes a lot. In contrast, the marine environment formed by rain is very stable and very suitable for the birth and reproduction of life. The earliest life on earth appeared about 3.2 billion years ago. These life forms are just the simplest life forms, single cells that can only be seen with a microscope. After billions of years of continuous evolution, a variety of rich life has been formed. The evolution of life on earth can be explained by a 24-hour timetable. At midnight, life began, but it was not until nine o'clock at night that life climbed onto land. Before that, all life existed in the ocean, which shows that the richness of marine life has existed since ancient times in the history of the earth. It is estimated that there are about 5 million to 50 million species in existence, but only1460,000 species have been recorded, and most of them still exist in unknown corners of the ocean. However, there are 33 phyla in the world, and the ocean accounts for 32 phyla. Among them, phyla 12 only exists in the ocean and cannot be found on land at all. Often close to the ocean, you will find that the types of marine life are indeed much richer than those on land. There are many tiny phytoplankton and zooplankton on the ocean surface. There are swimming tuna, mackerel, fish and ginseng in the middle waters; There are beautiful fish, shrimp and shellfish in the submarine hot spring area; There are barnacles, mussels and seaweed in the intertidal zone; There are young fish and shrimp in the mangrove forest at the estuary. The reason why the ocean can accommodate millions of colorful and distinctive species and as many as three to six levels of marine food chain is closely related to the vast living space. Marine food chain refers to the demand relationship between predators and prey in marine biological communities, starting from autotrophic bacteria or organic matter formed by photosynthesis, passing through plankton, herbivores and carnivores at all levels. The structure of the food chain is similar to a pyramid, with a large base, and each level is smaller than the previous level. The whole network consists of various complex food chains. Phytoplankton is the most important primary producer in the food chain, such as algae. In the sun, phytoplankton convert carbon dioxide and water into carbohydrates through photosynthesis, that is, solar energy is converted into chemical energy in chemical substances, which is stored for secondary zooplankton (such as krill) and other herbivorous and omnivorous animals. Because most phytoplankton are a group of organisms that are too small to be distinguished by the naked eye, it is difficult to see their types clearly, but from the large area of photosynthetic distribution shown in satellite photos, they are giants in the ocean. Small fish and shrimp belong to the second and third levels of the marine food chain. They feed on phytoplankton or zooplankton. The fourth and fifth levels are at the top of the food chain pyramid, such as sharks, mackerel and tuna. As far as living space is concerned, marine life is much luckier than land species. The total surface area of the earth is 5. 1 100 million square kilometers, and the ocean accounts for 7 1%, reaching 3.6 1 100 million square kilometers; The average depth of the ocean is 3795 meters, almost the height of Yushan Mountain. In such a vast space, the seabed topography is the same as land, with mountains, narrow valleys and volcanoes. From the coast, it can be divided into continental shelf, continental slope, ocean plain, seamount, mid-ocean ridge, abyss and trench. Even if the depth is different and the pressure changes greatly, in theory, as long as the pressure is adjusted well, marine life can swim up and down, feed, mate and reproduce in the sea. This website is dedicated to marine life. You can go and have a look: yzxx.jdjy./hdsj/main/hddw2.htm.