Anemones are polyps of the class Anthozoa.

                                                          Anemones are polyps of the class Anthozoa.

In fact, an attribute of the entire class Anthozoa is the absence of a medusa. These complex polips originated from scyphozoa medusae. Scyphozoans usually display a four-part symmetry, they eat a variety of crustaceans and fish, which they capture using stinging cells called nematocysts.They are very specialized animals.