👉 The term "corallidae" refers to a family of marine animals that includes the blue-green algae, commonly known as corals. These organisms are found in many different environments around the world, from saltwater oceans to freshwater habitats and even along the surface of lakes and rivers. Corallidae are characterized by their unique shape and coloration. They can be classified into two main groups: the fossil corallidae (also known as the "ancient" or "old"