Scyphozoa

Scyphozoa are a class of marine animals commonly known as true jellyfish. They have bell-shaped, soft bodies that pulse to move through the water and tentacles hanging from their edges, used for capturing prey. These creatures are free-floating and mostly water, with a simple life cycle involving both a swimming medusa stage and a sessile polyp stage in some species. Scyphozoans play important roles in ocean ecosystems as predators and prey, and some can deliver painful stings to humans. They are distinct from other cnidarians like coral and sea anemones due to their large, medusa-dominant structure.