Do Fish Belong to the Animal Kingdom? Explaining the Position of Fish in Biological Classification

As everyone knows, not everything that moves is an animal. And fish are also slightly different from what we usually think of as animals, so do fish belong to the animal kingdom?

Do fish belong to the animal kingdom?

Of course they do.Fish are the most ancient vertebrates. Generally, any multicellular organism capable of moving freely is an animal. You can determine this through cell analysis. Looking at animal cells simply, they only have a cell membrane, a nucleus, and cytoplasm (including mitochondria and so on). Plant cells, however, have a cell wall.

Fish are cold-blooded aquatic vertebrates whose bodies are covered with bony scales, that breathe with gills, use fins as organs of locomotion, and feed by means of upper and lower jaws, belonging to the subphylum Vertebrata within the phylum Chordata. Most people divide vertebrates into five major groups: fish (53%), birds (18%), reptiles (12%), mammals (9%), and amphibians (8%). According to statistics compiled in 1994 by the late Canadian scholar "Nelson", there are 24,618 species of living fish worldwide, accounting for more than half of all named vertebrates, and new species of fish are constantly being discovered, at an average rate of about 150 species per year. Over more than a decade, more than 1,500 species should have been added, and at present the number of named fish species worldwide is about 32,100.