1. Radial symmetry: The body of cnidarians is symmetrical around a central axis, which allows them to sense and respond to their surroundings in all directions.
2. Presence of tentacles: Cnidarians have specialized structures called tentacles, which are used for capturing and ingesting prey.
3. Simple tissue organization: Cnidarians have a relatively simple tissue organization, consisting of an outer epidermis and an inner gastrodermis, with a jelly-like layer in between.
4. Stinging cells: Cnidarians are named for their unique stinging cells called cnidocytes, which are used for defense and capturing prey.
5. Two body forms: Most cnidarians exhibit two body forms - the sessile polyp and the motile medusa.
6. Nerve net: Cnidarians have a nerve net, a diffuse network of nerve cells that allows them to sense and respond to changes in their environment.
7. Reproduction: Cnidarians exhibit a variety of reproductive strategies, including asexual reproduction, sexual reproduction, and regeneration.
8. Aquatic habitats: Cnidarians are exclusively aquatic and are found in a wide range of marine and freshwater environments.
characteristics of cnidarians
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