The characteristic that gives cnidarians their name is: cnidarian means "nettle" and nettles are plants that release stinging barbs into the skin. All cnidarians have stinging cell's. Cnidarians have complex tissues, a gut for digesting food, and a nervous system.
Yes. They are are the first phylum to display cell organization into tissues and the second to desplay radial symmetry.
Cnidarians belong to the level of organization known as "tissue level." They have tissues that are specialized for different functions, but they lack organ systems found in more complex organisms.
Cnidarians have two cell layers with a jelly-like layer in between.
The presence of only two tissue layers in cnidarians makes them diploblastic, meaning they have an outer ectoderm and inner endoderm. These simple body plans lack organs and complex systems found in higher animals.
small cnidarians and big cnidarians
Sponges are less complex because they are just made of individual cells. There is no level of organization past cells in sponges. Cnidarians, on the other hand, have tissues, a higher level of organization. Tissues allow for some forms, like box jelly fish, to have eyes (this is just one of many advantages of tissues). Cnidarians' level of organization stops there though, they have no organs (heart, brain, etc.).
cnidarians have no nervous system
Yes, cnidarians are invertebrates.
The cnidarians are in the Kindom family
cnidaria(similar to cnidarians)
Nope - Cnidarians are marine creatures !