Do cnidarian have jointed bones

No, cnidarians do not have jointed bones. They are a phylum of animals that includes jellyfish, corals, and sea anemones, and they possess a simple body structure with a gelatinous consistency. Instead of a skeletal system, cnidarians have a hydrostatic skeleton supported by water pressure. Their bodies are primarily made up of soft tissues and specialized cells, such as cnidocytes, for capturing prey.