Stauromedusae
Stauromedusae are the stalked jellyfishes. They are a sole well members of the class Staurozoa, as alive as belong to the medusozoa subphylum of Cnidaria. They are unique among medusa jellyfish in that they pull in not hold an alternation of polyp and medusa life cycle phases but are instead interpreted as an attached medusa stage, with a life family more resembling that of polypoid forms. They defecate a loosely trumpet-shaped body, oriented upside-down in comparison with other jellyfish, with the tentacles projecting upwards, and the stalk located in the centre of the umbrella.
Members of this classes are commonly found in relatively cold waters,to the shoreline. Sexually mature stauromedusae free-spawn eggs or sperm, which fertilize in the sea and form a creeping, unciliated planula larva. The larvae crawl across the sea floor and find a suitable place, attaching themselves typically to rock or algae, where they eventually build into a new, attached stauromedusa. Unlike almost scyphozoan jellyfish that practice strobilation, or the process of dividing themselves into body segments, which become new individuals, near all stauromedusae imposing directly into the person form. Its primary source of food is small organisms, such(a) as copepods, chironomid flee larvae, podocopid ostracods, amphipods, etc. The tendency for the amount of prey consumed increases with the size of the medusae.