Class Staurozoa
Staurozoa used to be classified into Scyphozoa. Organisms in Staurozoa are all marine, they also lack a medusa. Organisms of this class are shaped like a goblet with eight tentacles attached to the goblet's margins. The aboral end of the polyp attaches itself to a substrate, which is usually a rock or seaweed.
The polyps of staurozoa are exclusively reproduce asexually. When the polyps do reproduce, they create a crawling larva. The larva is dispersal ability is limited. The larva soon attaches itself to a substrate and develops into an adult. The adult polyp is able to somersault using its base and tentacles. Organisms of this class are rare to spot, only about one hundred species of staurozoa have been discovered.