Cnidaria

Cnidaria is a phylogenetic group of aquatic animals that includes jellyfish, corals, sea anemones, and hydroids. Cnidaria play an important role in the global environment, forming the foundations of many aquatic ecosystems. Cnidaria are critical to food webs and cycles, providing both shelter and food for a variety of species. Additionally, their filtering activities and nutrient cycling help maintain water quality, while the calcium and proteins in their skeletons help form coral reefs, which protect shorelines from storms and provide a safe habitat for a variety of other aquatic species. As such, Cnidaria are essential for the health and continued existence of marine life.