Seaweed and nori are somewhat similar in appearance and taste, but they are actually two different marine plants. Seaweed is a type of red algae that is mainly distributed along the southeast coast of China, while nori is a green algae that is widely distributed all over the world. Although seamoss and nori are both marine plants, they grow in different environments and morphological characteristics. Seaweed grows near the high tide line of the intertidal zone, whereas nori grows in the intertidal and subtidal zones. In addition, seaweed has thinner leaves and a softer texture, while nori has thicker leaves and a crisper texture. 
In terms of nutritional value, seaweed and seaweed are rich in protein, dietary fiber, vitamins and minerals and other nutrients, especially iron, iodine, selenium and other trace elements are relatively high. However, due to their different growth environments and morphological characteristics, their nutrient content and proportions also differ. 
Although nori and seaweed are both sea vegetables, they have some differences in nutrients and how they are eaten. First of all, seaweed is rich in iodine, which has a good effect on the health of the thyroid gland, while seaweed contains more protein and vitamin B12, which is helpful for improving human immunity. Secondly, seaweed has a crisp texture and is suitable for eating as a snack or cooking with other ingredients, while nori is softer and suitable for making soups or stir-frying with other ingredients.
In addition to the differences in taste and nutrient content, seaweed and nori are also different in the environment in which they are grown. Seaweed grows mainly on rocks in cold and temperate seas, whereas nori grows mainly in coastal areas of temperate and tropical seas. Therefore, when eating and choosing ingredients, we should choose according to our own needs and local seasonality**. In addition, it should be noted that with the increasing attention to health, the environmental protection requirements for ingredients are becoming more and more stringent. Therefore, when we buy seaweed and seaweed, we should choose brands and production methods that meet environmental requirements to ensure our health and the sustainable development of the ecological environment.