Material preparation: plasticine, colored mud and clay.

1. Take a proper amount of pink purple mud and roll it into an oval ball as the body of a small fish.

2. Take a proper amount of pink purple mud and roll it into drops.

3. Squeeze and knead into the shape of fish tail.

4. Take the silt, roll it into small balls and stick it on the tail as an ornament. Then take a proper amount of pink-purple mud and make it into the shape of a small fish dorsal fin.

5. Take a proper amount of pastel mud, roll it into small dots and stick it on the dorsal fin of the small fish as an ornament. Take a proper amount of pastel mud to make small fish eyes.

6. Take a proper amount of black mud to make small fish's black eyes. Take a proper amount of pastel mud to make a small fish mouth. Sticking to the body, dorsal fin and tail of a small fish. The round, lovely little fish is finished.

Morphological characteristics of fish:

The skin of fish consists of epidermis and dermis. The epidermis is very thin and consists of several layers of epithelial cells and mucus layers. The epidermis is rich in unicellular mucus glands, which can continuously secrete viscous liquid and form a mucus layer on the body surface, which has lubricating and protective effects on fish, such as reducing skin friction resistance; Improve athletic ability.

Remove bacteria and dirt attached to fish. At the same time, it makes the body surface slippery and easy to avoid the enemy. Therefore, the epidermis is of great significance to the life and survival of fish.

Distribution range of fish:

Southeast region:

These areas include Guangdong, Guangxi, Yunnan, Guizhou, Fujian, Taiwan Province and Hainan Island. Warm-loving fish mainly grow in these areas, and there are many varieties, such as shad, curly fish, mackerel, Dongpo fish, loach, loach, flat-headed loach, rock climbing loach, flat-finned loach, small-snout fish, long-finned catfish, bearded catfish, eel and so on.

The main cultured fish are southern species, such as herring, grass carp, silver carp, bighead carp, herring, snapper, catfish and tilapia.

River plain area:

These include the middle and lower reaches of the Yangtze River, the Yellow River and the Liaohe River. In addition to river basins, there are many lakes here, which are the main producing areas of freshwater fish in China. There are many natural aquatic fish, such as green grass, silver carp, bighead carp, carp, crucian carp, catfish, bream, bream, eel and so on.

Whitebait in Taihu Lake, sturgeon, catfish and bonito in Yangtze River all produce a lot. The fish species are green grass, silver carp, bighead carp, carp, crucian carp, bream, tilapia and some carp hybrids.