1. What are jellyfish, earthworms and snails?Primates can be divided into two suborders: Strepsirrhini: Primitive monkeys. Mouse lemurs (Cheirogaleidae) Lemuridae Lepilemuridae Indriidae Daubentoniidae Lorisidae Galagidae Haplorrhini: advanced monkeys, apes, and humans. Tarsiidae Cebidae Aotidae Pitheciidae Spider Monkeys (Atelidae) Cercopithecidae Hylobatidae Hominidae Orangutan 2. Are jellyfish animals?Jellyfish are animals! They belong to the phylum Cnidaria, but different jellyfish belong to different classes. For example, the peach jellyfish belongs to the class Hydrozoa, while the cyanojellyfish belongs to the class Medusa! 3. What kind of animals are octopus, scallop, Chinese sturgeon, shark, jellyfish, and crab?Fish: ④ Chinese sturgeon ⑤ shark Coelenterate: ① sea anemone ⑦ jellyfish Mollusk: ② octopus; ③ scallop Crustacean: 4. What kind of creature is a jellyfish?Jellyfish is a low-level marine invertebrate zooplankton, a carnivorous animal. Taxonomically, it belongs to the phylum Cnidaria (also known as Cnidaria) and the class Scyphozoa. There are about 200 known species. The body of a jellyfish looks like a transparent umbrella. The diameter of the umbrella varies. The diameter of a large jellyfish can reach 2 meters. Some whisker-like strips grow from the edge of the umbrella. These strips are called tentacles. Some tentacles can be as long as 20 to 30 meters, which is equivalent to the length of a large whale. Jellyfish floating in the water extend long tentacles in all directions. Some jellyfish have umbrellas with various patterns. In the blue ocean, these swimming jellyfish of different colors look very beautiful. Jellyfish appeared earlier than dinosaurs, dating back 650 million years. There are many types of jellyfish, about 250 species in the world, with diameters ranging from 10 cm to 100 cm, and they are commonly found in oceans everywhere. There are about 8 common species in my country, namely, moon jellyfish, white jellyfish, jellyfish, crown jellyfish, etc. People often classify them according to their umbrella-shaped bodies: some umbrella-shaped bodies are silvery, called silver jellyfish; some umbrella-shaped bodies are like monk's hats, called Portuguese man-of-war jellyfish; some umbrella-shaped bodies are like white sails on ships, called sail jellyfish; some are like umbrellas, called umbrella jellyfish; some umbrella-shaped bodies shine with the light of colorful clouds, called jellyfish... Most of them only live for a few weeks, and some live for about a year. Some deep-sea jellyfish can live longer. The umbrella-shaped body of ordinary jellyfish is not very large, only 20 to 30 centimeters long, but the umbrella of the larger jellyfish can reach a diameter of 2 meters, and the drooping tentacles are as long as 20 to 30 meters. In 1865, a jellyfish was washed ashore by the waves on the coast of Massachusetts, USA. Its umbrella was 2.28 meters in diameter and its tentacles were 36 meters long. If you stretch out the tentacles of this jellyfish, from the tip of one tentacle to the tip of another, it is 74 meters long. Therefore, it can be said that the jellyfish is the longest animal in the world. There are about 250 species of jellyfish in the world, with diameters ranging from 10 cm to 100 cm, and they are commonly found in oceans everywhere. |
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