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Condylactis Gigantea
Amenone? Anemome? Amemone?
Condylactis Gigantea- The Giant Caribbean Sea Anemone
http://www.thecephalopodpage.org/MarineInvertebrateZoology/Condylactisgigantea.html
The Condylactis Gigantea, or Giant Caribbean Sea Anemone does not have a skeleton. Mechanisms of defense and protection have been developed because it cannot move around to escape. The anemone is actually very hardy, considering it is made of a column, tentacles, and a foot. If threatened, the anemone will greatly reduce its size and draw its tentacles into cavity in the column. If tentacles are not drawn into the cavity, their volume is still reduced almost greatly. This approach to defense allows for the surface area of the animal to become small enough to almost shrink away from view. Some species of anemones possess acrorhagi, which are tentacles like a jellyfish.