Upside-down Jellyfish - Cassiopea frondosa

SKU: 206613
Manufacturer: That Fish Place
MPN: F93 0045 0407

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The Upside-down Jellyfish does not float around in the water like other jellyfish. Instead, it sits upside-down on sandy flats and uses its tentacles to catch plankton and other free-floating foods. They are also photosynthetic to some degree and will use the algae in their tissue to product food from the lighting of the tank.

These jellyfish benefit from target feedings of small foods like baby brine shrimp, cyclops, zooplankton, phytoplankton and dissolved nutrients. Lighting in the aquarium should be at least a moderate level with low flow. They also need an open sandy bottom to sit on and can reach an adult diameter of about ten inches.

These jellyfish do have stinging cells on their tentacles that can sting other aquarium tankmates. The sting can also affect aquarists, especially those with sensitive skin or who are sensitive to other stinging animals like anemones. Avoid touching the tentacles of these jellyfish.


F93 0045 0407
That Fish Place
Common NameUpside-down Jellyfish
Scientific NameCassiopea frondosa
Reef SafeYes
Invert SafeNo
Light IntensityModerate
DifficultyEasy to Moderate
Max Size (in inches)10 diameter
Min Tank Size (in gallons)100
Substratesand, fine
DietPlanktivore, Photosynthetic
Specific Gravity Range1.022-1.026
pH Range8.0-8.4
Temperature Range75-82
VenomousYes (stinging cells)
Internal Id

State Restrictions
Armed Forces Americas
Armed Forces Europe
Armed Forces Pacific
Puerto Rico


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This is a pretty jellyfish