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Cassiopea frondosa

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description Cassiopea frondosa Overview

Cassiopea frondosa is a species of upside-down jellyfish found in the Caribbean Sea and western Atlantic Ocean. It is characterized by its habit of resting inverted on soft substrates, such as mud or sand in shallow waters like mangroves. By positioning its bell against the seafloor and extending its oral arms upward, it exposes the symbiotic photosynthetic zooxanthellae in its tissues to sunlight. This symbiosis allows the jellyfish to supplement its nutrition, making it well-suited for shallow, sunlit coastal ecosystems.

help Cassiopea frondosa FAQ

Where is Cassiopea frondosa found?

Cassiopea frondosa is an upside-down jellyfish of the Caribbean Sea and western Atlantic Ocean. The species was described by Pallas in 1774. [MDPI study](https://www.mdpi.com/2673-1924/2/4/46)

Why does Cassiopea frondosa rest upside down?

Its bell rests on mud, sand, or another soft bottom while its oral arms point upward. This position helps its symbiotic photosynthetic algae receive light.

How is Cassiopea frondosa different from Cassiopea xamachana?

C. frondosa is often found in somewhat deeper areas, while C. xamachana is strongly associated with shallow muddy mangrove habitats. The two species can occur together in Florida Bay, the Bahamas, and the Caribbean.

Can Cassiopea frondosa sting people?

Cassiopea jellyfish are cnidarians and should not be handled, even though they usually remain on the bottom. Their oral arms and mucus can contain stinging structures that irritate skin.

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