description Cassiopea andromeda Overview
Cassiopea andromeda is a species of upside-down jellyfish found in shallow tropical and subtropical waters of the Indo-Pacific region. Rather than swimming continuously in open water, it commonly rests with its bell against the seafloor and its branching oral arms directed upward. Its tissues contain photosynthetic dinoflagellate symbionts that provide part of its nutrition, an adaptation suited to sunlit lagoons, mangroves, and other sheltered coastal habitats.
help Cassiopea andromeda FAQ
Why is Cassiopea andromeda called the 'upside-down jellyfish'?
Cassiopea andromeda is called the upside-down jellyfish because it rests with its bell against the seafloor and its branching oral arms directed upward. This unusual posture allows symbiotic algae (zooxanthellae) in its tissues to receive sunlight for photosynthesis.
Where can Cassiopea andromeda be found?
Cassiopea andromeda is found in shallow tropical and subtropical waters of the Indo-Pacific region. It commonly inhabits calm, sandy lagoons and seagrass beds where sunlight can readily penetrate to the seafloor.
Does Cassiopea andromeda sting humans?
Like other jellyfish, Cassiopea andromeda possesses stinging cells called nematocysts, but its sting is generally too mild to harm most humans. The species relies more on its symbiotic relationship with photosynthetic algae than on active prey capture.
What does Cassiopea andromeda eat?
Cassiopea andromeda obtains much of its nutrition from symbiotic algae (zooxanthellae) living in its tissues, which produce nutrients through photosynthesis. It also captures small planktonic organisms using its upward-pointing oral arms.
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