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Cassiopea xamachanaBigelow, 1892Cassiopea xamachana
Common Name: Upside-down jellyfish

PhylumClassOrderFamilyGenusSpecies
CnidariaScyphozoaRhizostomeaeCassiopeidaeCassiopeaxamachana
Synonyms
Cassiopea vanderhorsti, Stiasny, 1922
Habitat
Sandy areas in shallow waters. Often found surrounding mangroves.
Distribution
All oceans; particularly the Indo-Pacific, and around the Caribbean and Hawaii.
Natural History Notes
Live an upside down life so their symbiotic zoozanthellae can grow more quickly. The symbionts provide some nutrition to the organism. Budding occurs in polyp stage.
Individuals mixed in among Cassiopea frondosa.
Characteristics
Flattened bell-shape (disc-like), with branching oral arms covered in small clusters or paddle-like appendages.
Lacks a central mouth. Bell without marginal tentacles or pedalia, and the stomach is without gastric filaments. Gonads are located on the folds of the gastrodermis.
In Bocas Del Toro
Reported ByRachel Collin

Allen and Jennifer Collins (2005)

LocalityIsla Colon, Isla Bastimentos; numerous near Bocas station.
ObservationsWhen disturbed nematocysts may be found in nearby water column.
Images
Cassiopea xamachana
Cassiopea xamachana
Cassiopea xamachana
Cassiopea xamachana
Cassiopea xamachana
Cassiopea xamachana
Links
Reference
Brusca, R.C. and G.J. Brusca. 1990. Chapter 8: Phylum Cnidaria: The Cnidarian Bauplan. Invertebrates. Sinauer Associates, Inc. Sunderland, Massachusetts.

Humann P & Deloach N (1999). Reef creature identification Florida Caribbean Bahamas. New World Publications, Inc., Jacksonville, FL.
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