Cassiopea: Difference between revisions

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	'''''Cassiopea''''' ('''upside-down jellyfish''') is a ] of ] and the only members of the family '''Cassiopeidae'''.<ref>{{WoRMS \|id=135234 \|title=Cassiopeidae \|accessdate=3 August 2012}}</ref> They are found in warmer coastal regions around the world, including shallow mangrove swamps, mudflats, and ] flats in ]. The ] usually lives upside-down on the bottom, which has earned them the common name. Where found, there may be numerous individuals with varying shades of white, blue, green and brown.		'''''Cassiopea''''' ('''upside-down jellyfish''') is a ] of ] and the only members of the family '''Cassiopeidae'''.<ref>{{WoRMS \|id=135234 \|title=Cassiopeidae \|accessdate=3 August 2012}}</ref> They are found in warmer coastal regions around the world, including shallow mangrove swamps, mudflats, and ] flats in ]. The ] usually lives upside-down on the bottom, which has earned them the common name. Where found, there may be numerous individuals with varying shades of white, blue, green and brown.
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Revision as of 16:15, 22 March 2013

Not to be confused with Cassiopeia.

Cassiopea

Cassiopea sp.
Conservation status
Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Cnidaria
Class:	Scyphozoa
Order:	Rhizostomae
Suborder:	Kolpophorae
Family:	Cassiopeidae Agassiz, 1862
Genus:	Cassiopea Péron & Lesueur, 1809
Species
8 species, see text

Cassiopea (upside-down jellyfish) is a genus of true jellyfish and the only members of the family Cassiopeidae. They are found in warmer coastal regions around the world, including shallow mangrove swamps, mudflats, and turtle grass flats in Florida. The medusa usually lives upside-down on the bottom, which has earned them the common name. Where found, there may be numerous individuals with varying shades of white, blue, green and brown.

They have a mild sting since they are primarily photosynthetic, but sensitive individuals may have a stronger reaction. The photosynthesis occurs because, like most corals, they host zooxanthellae in their tissues. The stinging cells are excreted in a mucus; swimming over these jellies (especially using swim fins) may cause transparent, essentially invisible, sheets of this mucus to be lifted up into the water column, where they are then encountered by unsuspecting swimmers. The stings, appearing in the form of a red rash-like skin irritation, are notorious for being extraordinarily itchy. Sometimes this jellyfish is picked up by the crab Dorippe frascone (family Dorippidae) and carried on its back. The crab uses the jellyfish to defend itself against possible predators.

Species

According to the World Register of Marine Species, this genus includes 8 species:

References

"Cassiopeidae". WoRMS. World Register of Marine Species. Retrieved 3 August 2012.
Murphy, Richard C. (2002). Coral Reefs: Cities Under The Sea. Princeton, New Jersey: The Darwin Press. ISBN 0-087850-138-X. {{cite book}}: Check |isbn= value: length (help); Invalid |ref=harv (help)
"Cassiopea". WoRMS. World Register of Marine Species. Retrieved 3 August 2012.

External links

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