Cnidos

Cnidos, also known as sea nettles, are a group of marine animals belonging to the phylum Cnidaria. They are characterized by their stinging cells, called cnidocytes, which are used for defense and prey capture. Cnidos are found in both freshwater and marine environments, and include species such as jellyfish, corals, anemones, and hydroids. These animals have a simple body structure, consisting of a gelatinous body with a mouth surrounded by tentacles. The tentacles are lined with cnidocytes, which contain a harpoon-like structure that injects venom into prey or predators. The venom can cause pain, swelling, and in some cases, more serious reactions such as anaphylaxis. Cnidos play an important role in marine ecosystems, serving as both predators and prey for a variety of species. They are also of interest to humans for their potential use in medical research and biotechnology. Despite their sting, cnidos are fascinating creatures that have captured the imagination of scientists and the public alike.