Is squid a fish?
Squid is not a fish, but a kind of mollusk that lives in the ocean and does not belong to the category of fish. It belongs to the subclass Coleopoda, Coleopoda, Coleoptera, Coleoptera.
Squid actually belongs to shellfish.
Squid and squid are "relatives". In fact, it is not a fish, but a kind of shellfish, but its shell has degenerated into a white endoskeleton. Squid has a long and narrow body, which is a bit like the head of a javelin, so it is also called squid.
Squid is 24K pure shellfish. Shellfish is equivalent to the mollusk phylum, and squid is a part of the cephalopod. Strictly speaking, the name "squid" is unscientific, because it is a common name given to the classification system at that time due to economic factors several decades ago. However, at the beginning of this century, Chinese mainland has basically accepted the new classification system of cephalopod, which has changed greatly from the original classification system. The taxon of the species that squid refers to is also split and divided. Scientifically speaking, the name does not make much sense.
Conclusion: the above content is the introduction about whether squid is fish or not, which is sorted out by the editor of Tuliu.com. I hope it can help the needy friends.
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How many days does the silkworm grow?
Silkworm growth cycle is about 40 days, its development and temperature, humidity, food and so on are related. Generally, it takes 10-11 days for the green stage and about 25 days for the larval stage. Specifically, the first instar is 4-5 days; the second instar is 3-4 days; the third instar is 4 days; the fourth instar is 6 days; the fifth instar is 7-9 days;
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Breeding method of Camellia sinensis
Camellia propagation can be selected sowing propagation, cuttage, by, leaf insertion, high insertion, tree and other ways. According to camellia varieties and local environmental temperature to choose the appropriate breeding methods can be. Camellia propagation method 1, cutting selection growth is good, semi-lignification
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