JELLYFISH
ULMARIDAE
Moon Jelly
Aurelia aurita
Size
To 40cm

Description
:
Translucent whitish, pinkish or bluish dome with numerous
short encircling tentacles and eight simple marginal lobes.  Four clover-leaf shaped reproductive organs visble through the translucent dome. Four short frilly oral arms

Ecology
Open water from the surfae down to 20ft (7m). Often occur in large numbers inshore. Mild to moderate sting. The threadlike tentacles around the edge of the bell can sting, and may occasionally catch small swimming animals for food.. They feed mostly by trapping microscopic plankton in a film of mucus which flows over the surface of the bell and is picked off as it reaches the edges by the thick mouth tentacles underneath. They swim by pulsing the bell, pushing themselves slowly forwards through the water.

Life Cycle
Fixed, individual sexes (dioecious). Aurelia aurita has two main stages in its life cycle - the polyp stage (asexual reproduction) and the medusa stage (sexual reproduction).  A mature polyp reproduces asexually, known as budding  forming an entire colony of polyps. Polyps specializing in reproduction produce ephyra (small medusae) by budding. The medusae swim off and mature. They then reproduce sexually. From the egg and the sperm of two medusae, a zygote is formed. The zygote develops into a planula (larva). The planula larva leaves the adult medusae, finds a shaded surface, and attaches itself to it. The planula eventually develops into a new polyp, and the life cycle of the Aurelia aurita starts again.
    Ecological Descriptors
Habitat Size (cm) Diet Behaviour Sex 
EpiPel 40 Pla I, Sh F
Moon Jelly
290
291