Its abdomen bends and stretches flexibly, its tail strokes down and forward, and it can jump backwards continuously at an extremely fast speed. Some shrimps are not good at swimming, and big lobsters spend most of their time crawling on the sand and stones on the seabed.
Step 3 struggle
Most flounder live in the ocean, but some species can live in fresh water. European flounder often migrate from the ocean to the river to hunt. In summer, they can be traced back to the inland 65 kilometers away along the river. When autumn comes, they will return to the ocean to lay eggs.
4. tortoise
Turtle, the largest species in the turtle family, has a carapace more than one meter thick and weighs 150- 180 kg. When it parades in the sea, it mainly paddles with its first two feet at the same time, just like two paddles on a ship, and advances with the help of water. Turtles mainly eat plant foods such as seaweed, and sometimes eat animal foods such as fish and shrimp.
5. sea urchin
Most sea urchins live on the bottom of the sea, and they like to live in reef forests or crevices in the sea below the intertidal zone rich in algae, as well as in the hard sandy muddy shallow sea zone, which has the characteristics of avoiding light and coming out at night.
Edited on June 24, 2020
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What animals are there at the bottom of the sea and how does it move?
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Animals at the bottom of the sea have their own ways of moving. How do they all move?
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What are the activities of benthos?
The original sentence is: sea cucumber crawls by stretching its muscles and can only advance four meters per hour. There is a kind of fish, the body is like a shuttle, and it can swim dozens of kilometers per hour. When attacking other animals, it is faster than ordinary trains. Squid and octopus suddenly spray water forward and use the reverse thrust of water to quickly retreat. There are also some shellfish that don't move by themselves, but they can travel long distances under the boat for free. From the second volume of the third grade of People's Education Press, the author is You Shi. The extended textbook "Underwater World" is the second lecture of Unit 6, Book 6, a compulsory textbook for nine years in primary schools. Through vivid language, the author describes an underwater world with "peculiar scenery and rich products". Through the author's description of the underwater world, we can feel his love for nature and life. The text introduces the underwater world from these aspects: (1) The seabed is very quiet and dark; (2) Animals at the bottom of the sea often whisper to each other; (3) Animals in the sea have their own activities; (4) marine benthos is very different, and there are abundant mineral deposits on the seabed.
15 likes 732 browsing 2020-06-24.
What animals are there in the underwater world and how do they move?
The original sentence is: sea cucumber crawls by stretching its muscles and can only advance four meters per hour. There is a kind of fish, the body is like a shuttle, and it can swim dozens of kilometers per hour. When attacking other animals, it is faster than ordinary trains. Squid and octopus suddenly spray water forward and use the reverse thrust of water to quickly retreat. There are also some shellfish that don't move by themselves, but they can travel long distances under the boat for free. From the second volume of the third grade of People's Education Press, the author is You Shi. This is a popular science fair. Through vivid language, the author introduces the relevant knowledge of the seabed from the aspects of brightness, sound, animals and plants, mineral deposits, etc., and describes an underwater world with "strange scenery and rich products". Expressed his love and praise for nature. Extended data:
Underwater World Original: Do you know what the depths of the sea are like? When the sea is rough, the bottom of the sea is still calm. So, there's no sound at the bottom of the sea? Not exactly. Animals under the sea often whisper to each other, but we just can't hear them. If you use a special underwater listening device, you can hear all kinds of sounds: some buzz like bees, some chirp like birds, some bark like dogs, and some snore like people. They make one sound when eating, another sound when traveling, and give an alarm when they are in danger. Benthic animals have their own activity characteristics. Sea cucumber crawls by stretching its muscles and can only advance four meters per hour. Barracuda can swim thousands of meters per hour, and when attacking other animals, it is faster than ordinary trains. Squid and octopus can suddenly spray water forward and use the reverse thrust of water to quickly retreat. Some shellfish can't move by themselves, but they can travel long distances under the boat for free. There are also some deep-water fish, which have their own luminous organs and swim like twinkling stars. There are also great differences in marine benthos. Their colors are varied, including brown, purple and red, and their shapes are also different. Take the algae family as an example, from single-celled diatoms and dinoflagellates that can only be seen clearly with the help of a microscope to giant algae hundreds of meters long, there are more than 8,000 species. There are peaks and valleys on the seabed. It is rich in coal, iron, oil and natural gas, as well as rare metals with few reserves on land. The seabed is really a world with strange scenery and rich products.
10 likes 544 browsing 2020-06-26.
What are the small animals at the bottom of the sea and what are their activities?
There are many kinds of sea cucumbers, such as black, brown and white. They like to live on the bottom of fine sand and rocks with steady waves and algae. Sea cucumbers live in the depths of the sea floor, and they can only advance four meters per hour without swimming ... Shellfish can't move by themselves, and Pakistan is free to travel long distances under the ship because there are suction cups on board. Barracuda can swim dozens of kilometers per hour and attack other animals faster than ordinary trains. ... squid and octopus can suddenly spray water forward and use the reverse thrust of water to quickly retreat. Squid is what people often call "cuttlefish". It can spray ink-like substances into the water and pollute the surrounding seawater, thus taking the opportunity to escape.
145 likes 4,280 browsing 20 16- 12-02.
Marine animals have their own activities. What else do you know?
Shrinking, recoil, swimming, upright swimming, floating, shrinking: the movement mode of sea cucumber is like the "directional single trend" movement of gastropods, and its movement mode is like inchworm crawling. That is to say, when you start exercising, you should fully stretch your body, then the back of your body begins to contract and your tail moves forward. The contraction at the back of the body spreads to the front of the body like a wave. At the same time, the pins attached to the substrate leave the attachment point in turn from the back, and then attach to the front of the body. Then, based on this, the front of the body extends forward, and this action is repeated. Second, recoil: Squid Squid has many holes on its side and a funnel with a strange shape in front. Squid sucks water into the gill cavity through the hole on the side of the body and the funnel in front, and then discharges the water through the funnel. In this way, its body gets the power to push from behind, thus moving forward quickly. Third, swimming: fish use the contraction of trunk and tail muscles to make the body twist left and right repeatedly, press water backwards to push the body forward, rely on the swing of fins to push the water forward, and use the impulse of gill holes to spray water backwards to push the body forward. Fourth, swimming upright: Hippocampus Hippocampus often lives near coral or seaweed, and some live near seabed rocks. Because it swims very slowly, it is easy for other fish to prey on it. In order to protect itself, the hippocampus swims in a very strange posture: upright swimming. 5. Floating: The jellyfish changes the volume of the inner cavity by shrinking the shell and squeezing the inner cavity, and ejects the water in the cavity to move by spraying water. There is also going with the flow.
10 likes 1, 850 browse 2020-07- 14.
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