1. Saussurea involucrata: It grows slowly under the ice in winter, but grows in large quantities after thawing, belonging to low-temperature grass. When the water temperature rises to about 18℃, it begins to die and rot.

2. green cabbage: common in late spring and late autumn, it grows after the death of yellow cabbage or begins to grow after thawing, and even grows before it is civilized on the ice, which is easy to cause frostbite and peeling of sea cucumber and bring losses to the cultivation of ginseng rings.

3. Pennisetum: It can grow from late spring to early summer. It has high fiber content and is not easy to kill, and it is not easy to rot after death. Its growth speed is extremely fast, and it can grow dozens of centimeters every day at the peak of growth. It is one of the aquatic plants that cause serious harm to sea cucumber culture.

4. Cladosporium? It is common in summer, and it is similar to Hedyotis paniculata, but the difference is that the Phylogenesis is branched like a steel ball, which is thinner and shorter than Hedyotis paniculata.

5. Sponge flower, which is common in summer, is a kind of high-temperature grass. When the temperature is above 2℃, it begins to grow, and when it grows in large quantities, it can cover the whole beach surface, causing oxygen deficiency in the bottom, causing floating ginseng and peeling, which is the most harmful grass.

6. spirogyra? It grows in late spring and early summer, similar to green cabbage, softer and thinner than green cabbage, and the surface of grass is sticky.

7. Enteromorpha? During June-August, it breeds more, with tubular membrane, branches and leaves, and the height can reach more than 1 meter. The conditions are suitable and easy to breed in large quantities, and dead moss brings harm to sea cucumber culture.

8. fresh red moss (also known as red hairy grass)? It is common from June to September, and most of them grow on the edge of the Shenquan dam in a flower shape, with high fiber content, which is not suitable for decay. Due to the existence of gaps, it will basically have no impact on the beach surface and sea cucumbers.

9. Chicken claw dish? From June to September, it can be seen that some ginseng circles grow more and have less harm, so they can be fished or not treated. It can grow from late spring to early summer. This grass has high fiber content and is not easy to kill, and it is not easy to rot after death. It grows very fast, and it can grow dozens of centimeters every day at the peak of growth. It is one of the aquatic plants that cause serious harm to sea cucumber culture. Common in summer, it is a kind of high-temperature grass, which begins to grow above 2℃.