Life habits of crucian carp Carassius auratus is an omnivorous fish, but adult fish are mainly plant food. Because plant feed is rich in water, there are many kinds of edible plants. The stems, leaves, buds and fruits of vascular plants are the favorite foods of crucian carp, and crucian carp can obtain various rich nutrients in the waters where higher aquatic plants such as water chestnut and lotus root grow. Diatoms and some algae are also the food of crucian carp. They also like shrimp, earthworms, young snails and insects.

The feeding time of crucian carp varies with seasons. Spring is the peak season for feeding, feeding day and night; The feeding time in summer is morning, evening and evening; Feeding all day in autumn; In winter, they eat at about noon.

Carassius auratus living in rivers and flowing water likes to walk in groups. Sometimes with the water, sometimes against the water, they feed and lay eggs in shoals, bends, ditches and reeds rich in aquatic plants; When the current is slow or static and the bait is sufficient, they will temporarily settle down.

Crucian carp living in lakes and large reservoirs also choose to eat and live. Especially shallow water aquatic plants, are the places where they are concentrated. Even in winter, they love grass roots, and most of them don't swim in the deep water without grass for the winter.

Crucian carp, living in a small river pond, swims when it meets the current, stops when it meets the current and chooses to eat. In winter, I often dive into deep water for the winter.

Animal manuscript information: self-protection of animals in kindergarten science teaching plans

Activity objectives:

1, deepen the understanding of animal characteristics, and know that animals will use various methods to protect themselves and adapt to survival.

2. Understand some methods of animal self-protection.

3. Describe how animals protect themselves in vivid language.

Activity preparation:

1, a children's book.

2. Teaching wall chart.

Activity flow:

First of all, the story leads to the self-protection of animals.

Second, show the teaching wall chart to get a preliminary understanding of animal self-protection.

1, protect yourself with body color.

Question: Who is in the photo? Why are you so hard to find them?

Summary: Animals make their body colors the same as or similar to those of their surroundings, in order to hide themselves or avoid enemies.

2. Protect yourself with your body structure.

Question: Who is in the photo? What do you have on you? How do they protect themselves in danger?

Third, children read children's books to further understand the ways of self-protection.

Guide children to look at pictures and think. Say: What animals are there in the picture? What are they like? How do these animals protect themselves?

Fourth, the teacher leads the children to tell the picture completely together:

1, the color of the caterpillar is very bright, which is to warn the enemy not to eat me, I am poisonous;

2. The color of frog's body will change with the seasons;

3. The chameleon will change color with the change of environment;

4. The color of the leopard is very similar to the color of its surroundings;

5. Polar bears live in ice and snow, and their body color is white;

6. Crabs have two big pliers, which can be used to attack each other to protect themselves;

7. The color of lizards is very similar to that of the ground, so that they can hide themselves and not be easily discovered by others;

8. Lionfish have long stingers, which make the enemy afraid to approach;

9. The tortoise has a hard shell, and it is found that the enemy tortoise will retract its head and limbs into the hard shell;

10, the pattern of sika deer is similar to the color of the surrounding jungle, so it can hide itself.

Fifth, expand children's experience.

Inspire children to think boldly: What other animals do you know? How do they protect themselves?

Six, the teacher read riddles:

A big bird is really strange. It can run fast without wings.

When in danger, hide your head and leave your ass outside the beach.

Please guess what animal this is. And mark animals on the map.

Activity reflection:

It embodies the idea of autonomy, cooperation and inquiry advocated by the new curriculum standards. For the self-protection method of animals, through? Protective color? For example, guide students to read, observe and think, and summarize protection methods.