Scyphozoa | Rhizostomeae
Göthel, H. 1992. (Ref. 358)
Size / Weight / Age
Max length : 90.0 cm WD male/unsexed; (Ref. 358); common length : 60.0 cm WD male/unsexed; (Ref. 358)
Climate / Range
Northeast Atlantic and the Mediterranean.
Diameter of about 60 cm, exceptionally 90 cm. The sunshade is very bent, sometimes even higher than broad; the periphery is deprived of tentacles, replaced by approximately 80-90 lobes distributed on the entire circumference. One counts 8 very long oral; only braided arms towards their base; and comprising with milonguor of the appendices dermic in the cauliflower shape, while the ends smooth and are not ramified. Color: blue; yellow or pink milky; blue lobes ombrellaires with purple darker.
Largest in the Mediterranean, is rather not very irritant: the cnidocytes are slightly poisonous and do not transpierce the human skin; there is thus no risk of lesion. Habitat: Swim in the vicinity of surface in pelagic zone, but also in littoral zone. Biology: It is frequently observed that specimens are wrapped of alevins swarm of various species. This association is described in the works specialized like relation of protection, whose only alevins would benefit, but one knows few things on this subject. According to other observers, the fish would nourish themselves inter alia sexual organs of the jellyfish-host, which would thus constitute a form of parasitism. But of other authors make state of a cleaning of the jellyfish by alevins, which directs the relation towards a symbiosis. One supposes consequently that associations of jellyfishes and fish cover several aspects; spreading out parasitism with true symbiosis (Ref. 358). Members of the class Scyphozoa are gonochoric. Life cycle: Egg is laid by the adult medusa which later develops into a free-living planula, then to a scyphistoma to a strobila, and lastly to a free-living young medusa (Ref. 833).
IUCN Red List Status (Ref. 114614)
CITES status (Ref. 94142)
Threat to humans
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Estimation of some characteristics with mathematical models
High vulnerability (56 of 100)