
Sea The Difference: Cassiopeia, an Upside-Down Jellyfish
Groups of Cassiopeia jellyfish are commonly found upside-down on the seafloor, with their tentacles extending upwards into the water column above. These jellyfish, like corals, contain algae in their tentacles and turn upside-down to expose the algae to sunlight. Sometimes, however, they are seen pulsing to move, as shown in this photo taken by CSA staff offshore Key West.
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