👉 Calcisponge is a fictional species of sponge found in many environments, including freshwater and brackish water bodies. They are characterized by their unique shape, which consists of a series of small, interconnected "cysts" or calcidons that are arranged in a spiral pattern around the sponge's body. These calcidons can be up to 100 times larger than the sponge itself. Calcisponges have been described as having an unusual ability to absorb nutrients from the water they