Corals are creatures living in the ocean. They have life and can carry out various life activities. Specifically, corals belong to animals, they belong to coelenterates among invertebrates, even among invertebrates is a relatively low class of organisms. Therefore, their body structure is relatively simple, they do not have some very complex tissues and organs. However, they also have some basic body structure to help them complete the most basic life activities.
For example, as an animal, they need to eat. They have tentacles, and they use their tentacles when they hunt. They also have a mouth structure through which they feed after catching their prey. They also undergo digestion and absorption, which is followed by excretion. However, their mouth has the function of excretion, and there is no special excretion organ.
As mentioned above, coral is an animal. This seems strange to many people, because the shape of coral is like a clump of branches or bushes, and coral seems to be inactive. When judging whether corals are plants or animals, we should not only look at their appearance. In fact, coral is a group of coral insects or fossils formed by their bones, which belongs to the category of animals. Although they belong to animals, they can play some similar roles as plants, such as absorbing part of carbon dioxide and alleviating the greenhouse effect, which is similar to terrestrial plants.
