Many people think that corals are plants because most corals can't move, and many of them are branched. Most corals rely on the photosynthesis of unicellular algae in their bodies to provide energy, so they are really like plants. The scientific community also argued for a long time a century or two ago, but there is no doubt that they are animals.

Although corals are animals, there are * * * algae in their bodies, and even which * * * algae provide the color of corals and which * * * algae provide 90% of food. So it can be said that corals are stones, corals are animals, and algae in corals are plants. And they mainly rely on those plants to provide nutrients, and then animals make corals to form coral reefs.