Are bugs and fish animals?

Of course, insects and fish are animals, they are all animals on the earth.

Aquarium fish simply refer to those fish that have ornamental value, bright colors or peculiar shapes. It is said that there are 30,000 to 50,000 species of fish in the world, of which there are 2 to 3,000 species of freshwater fish that can be viewed, but only about 500 species are actually commonly raised and common.

Some of them live in freshwater, some in seawater, some from temperate regions, and some from tropical regions. Some of them are known for their brilliant colors, some for their strange shapes, and some for their rarity and preciousness.

In the world ornamental fish market, they are usually made up of three major strains, namely temperate freshwater ornamental fish, tropical freshwater ornamental fish, and tropical marine ornamental fish.

Ornamental fish mainly include marine fish, tropical fish, goldfish, koi fish, and other freshwater fish, which are called according to customary names in classification, and the classification is not necessarily correct.

Tropical fish: including lipid carp, cyprinidae, ichthyidae, cichlid, climbing perch, loach, catfish, etc.

Arowana: An ancient fish of the genus Tropical Fish.

Colorful Angelfish: This belongs to the family Cichlid in tropical fish.

China's goldfish: This is the "quintessence" of China, but many new varieties have been cultivated abroad.

Koi fish: Cultivated in many countries, but the best species are from Japan.

Marine fish: There are so many species that only a few hundred can be kept in aquariums.

Other fish: cold-water fish and soda fish.

Goldfish. Ornamental fish.

The domestication of goldfish has gone through two stages of pond culture and pot culture, after several generations of folk artists carefully selected, from the initial single-tailed golden crucian carp, gradually developed into double-tailed, three-tailed, four-tailed goldfish, the color is also from a single red, gradually formed red and white flowers, five flowers, black, blue, purple, etc., the body shape has also developed from a narrow spindle shape to an oval, spherical shape, etc., and the variety has also developed from a single golden crucian carp to dozens of colorful varieties, such as dragon eye, Chaotian dragon, blister, lion head, tiger head, pom-pom, pearl scales, Crane top red, etc. According to historical records, China's goldfish was first introduced to Japan in the Ming Dynasty and again in 1615-1623.

The original species of Japanese koi is red carp, which was introduced to Japan from China in the early days, and has gradually become one of the world-famous ornamental fish after careful breeding by the Japanese people. The main varieties of Japanese koi fish are red and white, Showa tricolor, Taisho tricolor, and Akitsui.

Marine fish. Seawater ornamental fish mainly come from the coral reef waters in the Indian Ocean and the Pacific Ocean, with many species of strange body shape, rich body color, extremely varied, good at hiding, and have a primitive and mysterious natural beauty. Common production areas include the Philippines, the South China Sea, Japan, Australia, the Hawaiian Islands, India, the Red Sea, and the east coast of Africa.

Tropical marine ornamental fish are extremely diverse, they live in the vast oceans, many of which are inaccessible to people, and there are many species that have not been discovered by humans. Tropical marine ornamental fish is the most promising ornamental fish in the world, representing the future development direction of ornamental fish.

Thus and fish are animals without a problem, thus mainly referring to insects and arthropods. Fish mainly refers to fish.

In 1969, Wittke proposed the five-boundary system.

He first divided organisms into two categories, prokaryotes and eukaryotes, according to the presence or absence of the nuclear envelope structure.

Prokaryotes are a kingdom. Eukaryotes are further divided according to the number of cells, and certain organisms consisting of single or multicellular cells are classified into the kingdom Protists.

The remaining multicellular eukaryotes are divided into the plant kingdom according to their trophic types, photoautotrophic and photoautotrophic; Fungal kingdom, saprophytic heterotrophic; Animalia, heterotrophic.

Animals are a large group of multicellular eukaryotic life forms called the kingdom Animalia.

Generally, inorganic matter cannot be synthesized into organic matter, and can only feed on organic matter (plants, animals or microorganisms), so it has a different morphological structure and physiological function from plants to carry out life activities such as feeding, digestion, absorption, respiration, circulation, excretion, sensation, movement and reproduction. Animals are a large group of organisms in nature, as opposed to plants, microorganisms. They mostly feed on organic matter, have nerves, feelings, and can move.

So insects and fish are animals!